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mesenchymoma
mesenchymoma[¦mez·ən·kī′mō·mə] (medicine) A tumor composed of cells resembling those of embryonic mesenchyme, or of mesenchyme with its derivatives. mesenchymoma
mesenchymoma [mes″eng-ki-mo´mah] a mixed mesenchymal tumor composed of two or more cellular elements that are not commonly associated, exclusive of fibrous tissue.mes·en·chy·mo·ma (mes'eng-kī-mō'mă), Rarely used term for a neoplasm in which there is a mixture of mesenchymal derivatives, other than fibrous tissue. A benign mesenchymoma may contain foci of vascular, muscular, adipose, osteoid, osseous, and cartilaginous tissue; such neoplasms are sometimes classed under a compounded name, for example, angioleiomyolipoma, and the like, but the broader term may be preferred. A malignant mesenchymoma may also occur as a similar mixture of two or more types of mesenchymal cells that are malignant (other than fibrous tissue cells).mesenchymoma A tumor that contain 2 or more mesenchymal elements in addition to fibroblasts; the term has specific significance in each affected organ Cartilage Vascular hamartoma, cartilaginous hamartoma A benign chest wall tumor of infancy Liver Hepatic mesenchymoma is a large, aggressive embryonal or 'primitive' sarcoma of the pediatric liver with a median survival of < 1 yr, characterized by necrosis, hemorrhage, cystic degeneration, atypical fibroblasts, and exuberant mitotic activity, entrapping hyperplastic bile duct-like structures Muscle Ecto-mesenchymoma An embryonal rhabdomyosarcoma with ganglionic differentiation. See Triton tumor. mes·en·chy·mo·ma (mes'eng-kī-mō'mă) Neoplasm in which there is a mixture of mesenchymal derivatives, other than fibrous tissue. A benign mesenchymoma may contain foci of vascular, muscular, adipose, osteoid, osseous, and cartilaginous tissue. A malignant mesenchymoma may also occur as a similar mixture of two or more types of mesenchymal cells that are malignant. |