ameloblastic sarcoma

ameloblastic sarcoma
see under fibrosarcoma.

Medical dictionary. 2011.

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  • ameloblastic fibrosarcoma — an odontogenic tumor that is the malignant counterpart to an ameloblastic fibroma, within which it usually arises. Called also ameloblastic sarcoma …   Medical dictionary

  • sarcoma — A connective tissue neoplasm, usually highly malignant, formed by proliferation of mesodermal cells. [G. sarkoma, a fleshy excrescence, fr. sarx, flesh, + oma, tumor] alveolar soft part s. a malignant …   Medical dictionary

  • fibrosarcoma — A malignant neoplasm derived from deep fibrous tissue, characterized by bundles of immature proliferating fibroblasts arranged in a distinctive herringbone pattern with variable collagen formation, which tends to invade locally and metastasize by …   Medical dictionary

  • tumor — 1. Any swelling or tumefaction. 2. SYN: neoplasm. 3. One of the four signs of inflammation (t., calor, dolor, rubor) enunciated by Celsus. [L. t., a swelling] acinar cell t. a …   Medical dictionary

  • layer — A sheet of one substance lying on another and distinguished from it by a difference in texture or color or by not being continuous with it. SEE ALSO: stratum, lamina. SYN: panniculus. ameloblastic l. the internal l. of the enamel organ. SYN: enam …   Medical dictionary

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