thoracic cancer breast cancer mammary tumor breast tumor ICD10CM:C50 malignant tumour of the breast MEDGEN:651 malignant breast tumor ICD9:174.8 DOID:1612 mammary tumour SCTID:254837009 breast cancer malignant breast neoplasm cancer of breast malignant neoplasm of the breast A primary or metastatic malignant neoplasm involving the breast. The vast majority of cases are carcinomas arising from the breast parenchyma or the nipple. Malignant breast neoplasms occur more frequently in females than in males. malignant tumor of breast malignant neoplasm of breast malignant tumour of breast malignant tumor of the breast icd11.foundation:1047754165 NCIT:C9335 malignant breast tumour primary breast cancer UMLS:C0006142 breast tumour breast neoplasm