mesenchymoma

Rarely used term for a neoplasm in which there is a mixture of mesenchymal derivatives, other than fibrous tissue. A benign m. may contain foci of vascular, muscular, adipose, osteoid, osseous, and cartilaginous tissue; such neoplasms are sometimes classed under a compounded name, e.g., angioleiomyolipoma, and the like, but the broader term may be preferred. A malignant m. may also occur as a similar mixture of two or more types of mesenchymal cells that are malignant (other than fibrous tissue cells).

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mes·en·chy·mo·ma .mez-ən-.kī-'mō-mə, .mēz- n, pl -mas also -ma·ta -mət-ə a benign or malignant tumor consisting of a mixture of at least two types of embryonic connective tissue

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mes·en·chy·mo·ma (mez″ən-ki-moґmə) a tumor of mixed mesenchymal tissues with two or more cellular elements not commonly associated, not counting fibrous tissue as one of the elements.