<unk>  is an extremely aggressive form of sarcoma made up of neoplastic<unk>  cells. A sarcoma is a tumor made of cells from connective tissue.<unk>  is an extremely rare tumor. Only three cases have been are reported so far. Prognosis is extremely poor. People with a<unk>  have no skin lesions, and pathology examination of the tumor shows it to be very malignant with an aggressive growth pattern.<unk>  should not be confused with extracutaneous<unk> ocytoma, a rare benign<unk>  cell tumor without destructive growth. In the cases observed,<unk>  terminated quickly as<unk>  cell leukemia; one of the most aggressive human cancers.
Mast cell sarcoma
Angiomatoid fibrous histiocytoma
Langerhans cell sarcoma
Epithelioid sarcoma
Malignant histiocytosis
Undifferentiated pleomorphic sarcoma
Alveolar soft part sarcoma
Ewing's sarcoma