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<import namespace="http://xbrl.sec.gov/dei/2012-01-31" schemaLocation="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd"/>
<import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/>
<import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/>
<import namespace="http://fasb.org/us-types/2012-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2012/elts/us-types-2012-01-31.xsd"/>
<element name="DocumentAndEntityInformationAbstract" id="ctix_DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CommonStockVotesPerShare" id="ctix_CommonStockVotesPerShare" type="xbrli:decimalItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="GrantOfResearchAndDevelopment" id="ctix_GrantOfResearchAndDevelopment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ResearchAndDevelopmentExpenseNetOfGrants" id="ctix_ResearchAndDevelopmentExpenseNetOfGrants" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="OtherCostsAndExpenses" id="ctix_OtherCostsAndExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="DeemedDividend" id="ctix_DeemedDividend" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="JanuaryMember" id="ctix_JanuaryMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="FebruaryMember" id="ctix_FebruaryMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="MarchMember" id="ctix_MarchMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AprilMember" id="ctix_AprilMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="MayMember" id="ctix_MayMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="JuneMember" id="ctix_JuneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="JulyMember" id="ctix_JulyMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AugustMember" id="ctix_AugustMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="OctoberMember" id="ctix_OctoberMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="NovemberMember" id="ctix_NovemberMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="DecemberMember" id="ctix_DecemberMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodValueExchangeOfOwnersEquity" id="ctix_StockIssuedDuringPeriodValueExchangeOfOwnersEquity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodSharesExchangeOfOwnersEquity" id="ctix_StockIssuedDuringPeriodSharesExchangeOfOwnersEquity" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodValueMerger" id="ctix_StockIssuedDuringPeriodValueMerger" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodSharesMerger" id="ctix_StockIssuedDuringPeriodSharesMerger" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodValueIssuedForCancellation" id="ctix_StockIssuedDuringPeriodValueIssuedForCancellation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodShareIssuedForCancellation" id="ctix_StockIssuedDuringPeriodShareIssuedForCancellation" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AdjustmentsToAdditionalPaidInCapitalForgivenessOfDebt" id="ctix_AdjustmentsToAdditionalPaidInCapitalForgivenessOfDebt" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CapitalContributed" id="ctix_CapitalContributed" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CancellationOfPreviouslyIssuedCommonStockValue" id="ctix_CancellationOfPreviouslyIssuedCommonStockValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CancellationOfPreviouslyIssuedCommonStockShares" id="ctix_CancellationOfPreviouslyIssuedCommonStockShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AdjustmentsToAdditionalPaidInCapitalModificationOfStockOptions" id="ctix_AdjustmentsToAdditionalPaidInCapitalModificationOfStockOptions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AdjustmentsToAdditionalPaidInCapitalForgivenessOfLiability" id="ctix_AdjustmentsToAdditionalPaidInCapitalForgivenessOfLiability" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="RepurchaseOfCommonStockValue" id="ctix_RepurchaseOfCommonStockValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="RepurchaseOfCommonStockShares" id="ctix_RepurchaseOfCommonStockShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodValueCharitableContributions" id="ctix_StockIssuedDuringPeriodValueCharitableContributions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodSharesCharitableContributions" id="ctix_StockIssuedDuringPeriodSharesCharitableContributions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodValueIssuedForServicesTwo" id="ctix_StockIssuedDuringPeriodValueIssuedForServicesTwo" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodShareIssuedForServicesTwo" id="ctix_StockIssuedDuringPeriodShareIssuedForServicesTwo" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodValueCommitmentFee" id="ctix_StockIssuedDuringPeriodValueCommitmentFee" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodSharesCommitmentFee" id="ctix_StockIssuedDuringPeriodSharesCommitmentFee" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodValueWarrantsExercised" id="ctix_StockIssuedDuringPeriodValueWarrantsExercised" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodSharesWarrantsExercised" id="ctix_StockIssuedDuringPeriodSharesWarrantsExercised" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ReclassificationOfWarrantLiabilitiesToEquity" id="ctix_ReclassificationOfWarrantLiabilitiesToEquity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodValuePreferredStock" id="ctix_StockIssuedDuringPeriodValuePreferredStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodSharesPreferredStock" id="ctix_StockIssuedDuringPeriodSharesPreferredStock" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodValueConversionOfPreferredStockToCommonStock" id="ctix_StockIssuedDuringPeriodValueConversionOfPreferredStockToCommonStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodSharesConversionOfPreferredStockToCommonStock" id="ctix_StockIssuedDuringPeriodSharesConversionOfPreferredStockToCommonStock" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="EquityIssuancePerShareAmountTwo" id="ctix_EquityIssuancePerShareAmountTwo" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="EquityIssuancePerShareAmountCharitableContributions" id="ctix_EquityIssuancePerShareAmountCharitableContributions" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="EquityIssuancePerShareAmountCommitmentFee" id="ctix_EquityIssuancePerShareAmountCommitmentFee" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="EquityIssuancePerShareAmountNetOfOfferingCosts" id="ctix_EquityIssuancePerShareAmountNetOfOfferingCosts" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="IssuanceOfStockAndStockOptionsForServicesCompensationRenderedAndCharitableContributions" id="ctix_IssuanceOfStockAndStockOptionsForServicesCompensationRenderedAndCharitableContributions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CancellationOfStockIssuedForServices" id="ctix_CancellationOfStockIssuedForServices" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ProceedsFromIssuanceOfCommonStockNetOfOfferingCosts" id="ctix_ProceedsFromIssuanceOfCommonStockNetOfOfferingCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
 
<element name="CommonStockIssuedToAcquireBusinesses" id="ctix_CommonStockIssuedToAcquireBusinesses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="SupplementalForgivenessOfDebtByRelatedParty" id="ctix_SupplementalForgivenessOfDebtByRelatedParty" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="SupplementalReclassificationOfAccruedInterestToDebtPrincipal" id="ctix_SupplementalReclassificationOfAccruedInterestToDebtPrincipal" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CancellationOfCommonStockForServices" id="ctix_CancellationOfCommonStockForServices" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CapitalContribution" id="ctix_CapitalContribution" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CancellationOfCommonStockAsResultOfSettlement" id="ctix_CancellationOfCommonStockAsResultOfSettlement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CancellationOfTreasuryStock" id="ctix_CancellationOfTreasuryStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ConversionOfWarrantsToCommonStock" id="ctix_ConversionOfWarrantsToCommonStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
 
<element name="DeemedDividendFromBeneficialConversionFeatureOnPreferredStock" id="ctix_DeemedDividendFromBeneficialConversionFeatureOnPreferredStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="DeemedDividendWarrants" id="ctix_DeemedDividendWarrants" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ConversionOfPreferredStockIntoCommonStock" id="ctix_ConversionOfPreferredStockIntoCommonStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="SharesIssuedAsDeferredOfferingCosts" id="ctix_SharesIssuedAsDeferredOfferingCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="GoingConcernAbstract" id="ctix_GoingConcernAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="GoingConcernDisclosureTextBlock" id="ctix_GoingConcernDisclosureTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AccruedExpensesAbstract" id="ctix_AccruedExpensesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AccruedExpensesTextBlock" id="ctix_AccruedExpensesTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
 
 
<element name="NotesPayableToRelatedPartyTextBlock" id="ctix_NotesPayableToRelatedPartyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CashAndCashEquivalentsRestrictedCashAndMarketableSecuritiesPolicyTextBlock" id="ctix_CashAndCashEquivalentsRestrictedCashAndMarketableSecuritiesPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="SignificantEstimatesPolicyTextBlock" id="ctix_SignificantEstimatesPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CertainRisksAndUncertaintiesPolicyTextBlock" id="ctix_CertainRisksAndUncertaintiesPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AccountingForStockBasedCompensationPolicyTextBlock" id="ctix_AccountingForStockBasedCompensationPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ScheduleOfAccruedSalariesAndPayrollTaxesTableTextBlock" id="ctix_ScheduleOfAccruedSalariesAndPayrollTaxesTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="BusinessDescriptionAndBasisOfPresentationTable" id="ctix_BusinessDescriptionAndBasisOfPresentationTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/> 
<element name="CountriesWhereCompositionOfMatterPatentsIssuedMember" id="ctix_CountriesWhereCompositionOfMatterPatentsIssuedMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="OtherCountriesMember" id="ctix_OtherCountriesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="BusinessDescriptionAndBasisOfPresentationLineItems" id="ctix_BusinessDescriptionAndBasisOfPresentationLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="NumberOfPharmaceuticalCompounds" id="ctix_NumberOfPharmaceuticalCompounds" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="NumberOfCompoundsForWhichPatentApplicationsFiled" id="ctix_NumberOfCompoundsForWhichPatentApplicationsFiled" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
 
<element name="AmountPaidToInvestors" id="ctix_AmountPaidToInvestors" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ChiefScientificOfficerMember" id="ctix_ChiefScientificOfficerMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="NumberOfExecutiveOfficers" id="ctix_NumberOfExecutiveOfficers" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PercentageOfAnnualIncreaseInSalary" id="ctix_PercentageOfAnnualIncreaseInSalary" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AccruedConsultingFeeCurrent" id="ctix_AccruedConsultingFeeCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
 
 
 
<element name="AgreementTable" id="ctix_AgreementTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/> 
<element name="AgreementAxis" id="ctix_AgreementAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/> 
<element name="AgreementDomain" id="ctix_AgreementDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CommonStockPurchaseAgreementMember" id="ctix_CommonStockPurchaseAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AspireCapitalFundLlcMember" id="ctix_AspireCapitalFundLlcMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AgreementLineItems" id="ctix_AgreementLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
 
<element name="TermOfAgreement" id="ctix_TermOfAgreement" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="FinancingAgreementMember" id="ctix_FinancingAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="WorkingCapitalRequirementFundsObtainedFromFinancingAgreement" id="ctix_WorkingCapitalRequirementFundsObtainedFromFinancingAgreement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="WorkingCapitalDeficit" id="ctix_WorkingCapitalDeficit" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="SettlementAgreementMember" id="ctix_SettlementAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="FormerCeoMember" id="ctix_FormerCeoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PeriodForRepurchaseOfShares" id="ctix_PeriodForRepurchaseOfShares" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="SettlementLiability" id="ctix_SettlementLiability" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="LegalSettlementAgreementMember" id="ctix_LegalSettlementAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ToxikonCorporationMember" id="ctix_ToxikonCorporationMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
 
 
 
<element name="KardScientificMember" id="ctix_KardScientificMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="OperatingLeasesRentExpenseMonthlyRent" id="ctix_OperatingLeasesRentExpenseMonthlyRent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
 
<element name="PromissoryNotePayableMember" id="ctix_PromissoryNotePayableMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PromissoryNotePayableBMember" id="ctix_PromissoryNotePayableBMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PromissoryNotePayableCMember" id="ctix_PromissoryNotePayableCMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PercentageOfInterestRateChange" id="ctix_PercentageOfInterestRateChange" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="DebtInstrumentAccruedInterestConvertedIntoAdditionalPrincipal" id="ctix_DebtInstrumentAccruedInterestConvertedIntoAdditionalPrincipal" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="StockIssuedDuringPeriodSharesAgainstOfficerLoan" id="ctix_StockIssuedDuringPeriodSharesAgainstOfficerLoan" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ClosingBidPriceOfShares" id="ctix_ClosingBidPriceOfShares" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="MaximumPercentageOfClosingBidPriceOnDateFactor" id="ctix_MaximumPercentageOfClosingBidPriceOnDateFactor" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="VestingTermOfShares" id="ctix_VestingTermOfShares" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermRollForward" id="ctix_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermRollForward" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm" id="ctix_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermThree" id="ctix_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermThree" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ConsultantsMember" id="ctix_ConsultantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="CompensationExpensesPerMonth" id="ctix_CompensationExpensesPerMonth" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="IncreaseInCompensationExpensesPerMonth" id="ctix_IncreaseInCompensationExpensesPerMonth" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="NumberOfStockOptionsAwardedToConsultant" id="ctix_NumberOfStockOptionsAwardedToConsultant" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="IncentiveStockOptionsPlan2009Member" id="ctix_IncentiveStockOptionsPlan2009Member" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="EquityIncentivePlan2010Member" id="ctix_EquityIncentivePlan2010Member" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="TermOfIncentiveStockOptionGranted" id="ctix_TermOfIncentiveStockOptionGranted" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PercentageOfCombinedVotingPower" id="ctix_PercentageOfCombinedVotingPower" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="WarrantsIssuedAndOutstanding" id="ctix_WarrantsIssuedAndOutstanding" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="WeightedAverageExercisePriceOfWarrants" id="ctix_WeightedAverageExercisePriceOfWarrants" type="us-types:perUnitItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="WarrantsExpired" id="ctix_WarrantsExpired" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="WarrantsOptionsOutstandingWeightedAverageRemainingContractualTerm2" id="ctix_WarrantsOptionsOutstandingWeightedAverageRemainingContractualTerm2" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="WarrantsOptionsOutstandingIntrinsicValue" id="ctix_WarrantsOptionsOutstandingIntrinsicValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
 
 
 
 
<element name="NumberOfSharesAuthorizedToPurchasedPerBusinessDay" id="ctix_NumberOfSharesAuthorizedToPurchasedPerBusinessDay" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AmountOfSharesAuthorizedToPurchasedPerBusinessDay" id="ctix_AmountOfSharesAuthorizedToPurchasedPerBusinessDay" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PeriodOfPriorWrittenNotice" id="ctix_PeriodOfPriorWrittenNotice" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PercentageOfTradingVolumesForNextBusinessDays" id="ctix_PercentageOfTradingVolumesForNextBusinessDays" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="VolumeWeightedAveragePricePurchasePriceDescription" id="ctix_VolumeWeightedAveragePricePurchasePriceDescription" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ThresholdLimitOfVolumeWeightedAveragePricePurchasePrice" id="ctix_ThresholdLimitOfVolumeWeightedAveragePricePurchasePrice" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AmountGrantedUnderSubscriptionAgreement" id="ctix_AmountGrantedUnderSubscriptionAgreement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="InstallmentFundingTerm" id="ctix_InstallmentFundingTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PercentageOfTotalVolumeTradedFactorTwo" id="ctix_PercentageOfTotalVolumeTradedFactorTwo" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="NumberOfTradingDaysFactorTwo" id="ctix_NumberOfTradingDaysFactorTwo" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="MaximumPercentageOfClosingBidPriceOnDateFactorTwo" id="ctix_MaximumPercentageOfClosingBidPriceOnDateFactorTwo" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="LowestBidPricePercentagePriorToConversionFactorTwo" id="ctix_LowestBidPricePercentagePriorToConversionFactorTwo" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="LowestBidPriceNumberOfDaysPriorToConversionFactorTwo" id="ctix_LowestBidPriceNumberOfDaysPriorToConversionFactorTwo" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PercentageCommonStockOwnedOfTotalCommonStockOutstanding" id="ctix_PercentageCommonStockOwnedOfTotalCommonStockOutstanding" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="ExpiryTermOfWarrants" id="ctix_ExpiryTermOfWarrants" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PreferredStockConversionPrice" id="ctix_PreferredStockConversionPrice" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AggregateAmountFundedUnderSubscriptionAgreement" id="ctix_AggregateAmountFundedUnderSubscriptionAgreement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="TerminationOfSubscriptionForRemainingAmountOfSubscriptionAgreement" id="ctix_TerminationOfSubscriptionForRemainingAmountOfSubscriptionAgreement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="EquityIncentivePlans2009And2010Member" id="ctix_EquityIncentivePlans2009And2010Member" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="EquityIncentivePlans2010Member" id="ctix_EquityIncentivePlans2010Member" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="SharesIssuedForServicesAtEndOfEachMonth" id="ctix_SharesIssuedForServicesAtEndOfEachMonth" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="AggregateNumberOfOptionsAwardedDuringPeriod" id="ctix_AggregateNumberOfOptionsAwardedDuringPeriod" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/> 
<element name="PercentageOfNetSalesAgreedToPayToInvestor" id="ctix_PercentageOfNetSalesAgreedToPayToInvestor" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" nillable="true"/>
<element name="AccrudeExpenseToRelatedPartyAbstract" id="ctix_AccrudeExpenseToRelatedPartyAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="true" nillable="true"/>
<element name="AccrudeExpenseToRelatedPartyTextBlock" id="ctix_AccrudeExpenseToRelatedPartyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" nillable="true"/>
<element name="CommonStockSharesCommittedToPurchaseValue" id="ctix_CommonStockSharesCommittedToPurchaseValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" abstract="false" nillable="true"/>
<element name="EffectiveIncomeTaxRateReconciliationDeferredTaxAssetsValuationAllowance" id="ctix_EffectiveIncomeTaxRateReconciliationDeferredTaxAssetsValuationAllowance" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" abstract="false" nillable="true"/>
<element name="PeriodOfAgreement" id="ctix_PeriodOfAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" nillable="true"/>
<element name="CommonStockPurchaseWarrantExercisablePrice" id="ctix_CommonStockPurchaseWarrantExercisablePrice" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" abstract="false" nillable="true"/>
</schema>


