{"description":"A cardiac myxoma originating in the left atrium and extending through the mitral valve into the left ventricle.","id":"cardiac-myxoma","identifier":[{"system":"http://example.org/fhir/bodystructure-identifiers","value":"M1"}],"includedStructure":[{"structure":{"text":"Left atrium"}},{"structure":{"text":"Left ventricle"}}],"patient":{"reference":"Patient/example"},"resourceType":"BodyStructure","spanningMorphology":{"text":"Cardiac myxoma"}}