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.
Available online 1 October 2005. Spindle cell lesions of the breast constitute a wide spectrum of benign and malignant proliferations. Myofibroblasts, normal cellular constituents of the mammary intra- and interlobular stroma, compose many of these lesions, which include reactive proliferations and benign or locally aggressive neoplasms.