giant cell sarcoma

sarcoma /sar·co·ma/ (sahr-ko´mah) pl. sarcomas, sarco´mata   any of a group of tumors usually arising from connective tissue, although the term now includes some of epithelial origin; most are malignant.

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alveolar soft part sarcoma  a well-circumscribed, painless, highly metastatic neoplasm with a distinctive alveolar pattern, usually in the limbs, head, and neck of young adults.

ameloblastic sarcoma  see under fibrosarcoma.

botryoid sarcoma , sarcoma botryoi´des an embryonal rhabdomyosarcoma arising in submucosal tissue, usually in the upper vagina, cervix uteri, or neck of urinary bladder in young children and infants, presenting grossly as a polypoid grapelike structure.

clear cell sarcoma of kidney  a malignant kidney tumor similar to Wilms' tumor but with poorer prognosis, often metastasizing to bone.

endometrial stromal sarcoma  a pale, polypoid, fleshy, malignant tumor of the endometrial stroma.

Ewing's sarcoma  a highly malignant, metastatic, primitive small round cell tumor of bone, usually in the diaphyses of long bones, ribs, and flat bones of children and adolescents.

giant cell sarcoma 

1. a form of giant cell tumor of bone arising malignant de novo rather than transforming to malignancy.

2. sarcoma characterized by large anaplastic (giant) cells.

hemangioendothelial sarcoma  hemangiosarcoma.

immunoblastic sarcoma of B cells  large cell immunoblastic lymphoma composed predominantly of B cells.

immunoblastic sarcoma of T cells  large cell immunoblastic lymphoma composed predominantly of T cells.

Kaposi sarcoma  a multicentric, malignant neoplastic vascular proliferation, characterized by the development of bluish-red nodules on the skin, sometimes with widespread visceral involvement; a particularly virulent, disseminated form occurs in immunocompromised patients.

Kupffer cell sarcoma  hepatic angiosarcoma.

osteogenic sarcoma  osteosarcoma.

pseudo–Kaposi sarcoma  unilateral subacute to chronic dermatitis occurring in association with an underlying arteriovenous fistula and closely resembling Kaposi's sarcoma clinically and histologically.

reticulum cell sarcoma  histiocytic lymphoma.

Rous sarcoma  a virus-induced sarcoma-like growth of fowls.

soft tissue sarcoma  a general term for a malignant tumor derived from extraskeletal connective tissue, including fibrous, fat, smooth muscle, nerve, vascular, histiocytic, and synovial tissue, with almost all lesions arising from primitive mesoderm.

spindle cell sarcoma 

1. any sarcoma composed of spindle-shaped cells.

2. a type of soft tissue sarcoma whose cells are spindle-shaped and which is usually resistant to radiation therapy.

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giant cell sarcoma

n.

A malignant giant cell tumor of bone.

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giant cell sarcoma.

See giant cell myeloma, osteoblastic sarcoma.

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sarcoma

a tumor, often highly malignant, composed of cells derived from connective tissue such as bone and cartilage, muscle, blood vessel or lymphoid tissue. These tumors usually develop rapidly and metastasize through the lymph vessels.

The different types of sarcomas are named after the specific tissue they affect: fibrosarcoma—in fibrous connective tissue; lymphosarcoma—in lymphoid tissues; osteosarcoma—in bone; chondrosarcoma—in cartilage; rhabdosarcoma—in muscle; liposarcoma—in fat cells.

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feline post-traumatic sarcoma

seen in cats, usually following injury from a penetrating injury to the eye. An orbit-destructive and sometimes metastasizing spindle-cell sarcoma develops months or years later.

feline vaccine-associated sarcoma

a rare malignancy in cats occurring in sites typically used for the injection of vaccines. There is an often rapidly growing, soft tissue swelling most commonly located over the cervical-interscapular region or thigh, which is a highly invasive tumor, usually a fibrosarcoma. Treatment by surgical resection, radiation therapy and/or chemotherapy may not be successful. In 1996, a Feline Vaccine-Associated Sarcoma Task Force was formed to investigate the condition and to issue guidelines for administration of vaccines and for the management of injection site masses and tumors. A causal relationship with rabies and feline leukemia virus vaccines has been found. Called also feline injection site sarcoma.

giant cell sarcoma

a malignant form of giant cell tumor of bone.

infectious sarcoma

see canine transmissible venereal tumor.

mast cell sarcoma

see mast cell tumor.

melanocytic sarcoma

melanoma.

osteogenic sarcoma

see osteosarcoma.

post-traumatic sarcoma

see feline post-traumatic sarcoma (above).

reticulum cell sarcoma

an old term for a form of malignant lymphoma, histiocytic lymphosarcoma, in which the dominant cell type is thought to be derived from histiocytic or macrophage origin. There is increasing evidence, however, that this neoplasm arises from transformed lymphocytes or immunoblasts.

Rous sarcoma

see rous sarcoma.

spindle-cell sarcoma

see hemangiopericytoma.

Sticker's sarcoma

see canine transmissible venereal tumor.

transmissible venereal sarcoma

see canine transmissible venereal tumor.

sarcoma virus

see feline sarcoma virus.