embryonal rest

embryonal rest

A nonmalignant nonneoplastic primitive–embryonal element–eg wolffian and müllerian duct elements, which is retained after birth
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
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There are several prevailing theories of the pathophysiology of endometriotic lesions which include the coelomic metaplasia theory, the embryonal rest theory, and the retrograde menstruation theory [7].
Malignant Transformation of Endometriosis in the Ischioanal Fossa
These tumors may result from metaplasia of fibroblasts, be derived from primitive mesenchymal cells, or possibly arise from embryonal rests of the cartilaginous matrix within the bone.
Primary intracranial extraskeletal chondrosarcoma
Chondrosarcomas arise from either chondrocytes, embryonal rests, or mesenchymal cells that undergo multidirectional differentiation.
Chondrosarcoma of the nasal septum

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