description: A patient who has been diagnosed with or is receiving medical treatment for a malignant growth or tumor. The only difference between CancerPatient and [US Core Patient](http://hl7.org/fhir/us/core/StructureDefinition-us-core-patient.html) is that Patient.deceased is a [must-support](https://www.hl7.org/fhir/profiling.html#mustsupport) element in mCODE. Must-support is an instruction to implementers of FHIR clients and servers, rather than a constraint on data structure. Any Patient resource complying with US Core Patient Profile will also comply with CancerPatient.
package_name: hl7.fhir.us.mcode
derivation: constraint
name: CancerPatient
type: Patient
elements:
  extension:
    mustSupport: true
    index: 0
    slicing:
      slices:
        birthsex:
          match: {}
          schema: {mustSupport: true, index: 0}
  deceased:
    mustSupport: true
    choices: []
    index: 2
package_version: 4.0.0-ballot
extensions:
  birthsex: {url: null, mustSupport: true, index: 0}
class: profile
kind: resource
url: http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-cancer-patient
base: http://hl7.org/fhir/us/core/StructureDefinition/us-core-patient
version: 4.0.0-ballot