Product Highlights. The A290 Series fixed bar return air filter grille with fixed horizontal blades accepts a 1 air filter (not included) and features 3/4 fin spacing.
A sarcoma (from the Greek ÏÎ¬ÏÎ¾ sarx meaning flesh) is a cancer that arises from transformed cells of mesenchymal origin. Thus, malignant tumors made of cancellous bone, cartilage, fat, muscle, vascular, or hematopoietic tissues are, by definition, considered sarcomas.This is in contrast to a malignant tumor originating from epithelial cells, which are termed carcinoma.Human sarcomas are quite rare. Common malignancies, such as breast, colon, and lung cancer, are almost always carcinoma.his is in contrast to a malignant tumor originating from epithelial cells, which are termed carcinoma. Human sarcomas are quite rare. Common malignancies, such as breast, colon, and lung cancer, are almost always carcinoma.
The diagnosis of gliosarcoma is based on a biphasic tissue pattern composed of two distinct malignant cell populations, one component being gliomatous (fulfilling the criteria for glioblastoma) and the other with malignant mesenchymal differentiation (fulfilling the criteria for being a sarcoma).lthough one component of gliosarcoma is clearly of astrocytic origin the histogenesis of the sarcomatous component is still controversial. Feign et al in 1955 described gliosarcoma as glioblastoma in which the proliferating tumor vessels acquired features of a sarcoma.