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  <element id="vcel_OperatingAndCapitalLeasesFutureMinimumPaymentsDueAbstract" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_OperatingAndCapitalLeasesFutureMinimumPaymentsDue" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_OperatingAndCapitalLeasesFutureMinimumPaymentsDueCurrent" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_NetOperatingLossDecreaseInPeriod" name="NetOperatingLossDecreaseInPeriod" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_IncomeTaxReconciliationLimitationsOnNetOperatingLoss" name="IncomeTaxReconciliationLimitationsOnNetOperatingLoss" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_ScheduleOfFutureMinimumRentalPaymentsForOperatingAndCapitalLeasesTableTextBlock" name="ScheduleOfFutureMinimumRentalPaymentsForOperatingAndCapitalLeasesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_ComputerEquipmentAndComputerSoftwareIntangibleAssetMember" name="ComputerEquipmentAndComputerSoftwareIntangibleAssetMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_DeferredTaxAssetsResearchAndDevelopmentCosts" name="DeferredTaxAssetsResearchAndDevelopmentCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_AccruedExpensesCurrent" name="AccruedExpensesCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_AccruedExpensesOtherCurrent" name="AccruedExpensesOtherCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_OperatingLossCarryforwardsLimitationsOnUseProjectedAnnualLimitationOnUseOfNetOperatingLosses" name="OperatingLossCarryforwardsLimitationsOnUseProjectedAnnualLimitationOnUseOfNetOperatingLosses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_PropertyInAnnArborMichiganMember" name="PropertyInAnnArborMichiganMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_PropertyInCambridgeMassachusettsMember" name="PropertyInCambridgeMassachusettsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_OperatingLeasesMarketValueRenewalOptionsNumber" name="OperatingLeasesMarketValueRenewalOptionsNumber" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_IncomeTaxesTable" name="IncomeTaxesTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_IncomeTaxesLineItems" name="IncomeTaxesLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_AllCountriesExceptUnitedStatesOfAmericaMember" name="AllCountriesExceptUnitedStatesOfAmericaMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcel_ScheduleOfIncomeLossBeforeIncomeTaxesTableTextBlock" name="ScheduleOfIncomeLossBeforeIncomeTaxesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>