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short long WHO

  Normal breast
  Non-neoplastic lesions
  Benign epithelial
   proliferations
  Fibro/myoepithelial
   tumors

  Tumors of the nipple

  Lobular neoplasia

  Intraductal prolifera-
   tive lesions

  Invasive epithelial
   tumors

    
IDC ILC Other

  Mesenchymal tumors

  Hematopoetic and
   metastatic tumors

  IH-stainings, TMAs,
   FISH and CISH

Carcinosarcoma

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Carcinosarcoma consists of infiltrating carcinoma (usually grade II-III) merged with a highly cellular, mitotically active pleomorphic spindle cell stroma (sarcoma). The sarcoma component resembles histologically malignant fibrous histiocytoma (MFH) or fibrosarcoma. This tumor is probably derived from myoepithelial cells. Carcinosarcoma is a very aggressive tumor form with a very poor prognosis.
Carcinosarcoma  

 


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