embryonal rest

A nonmalignant nonneoplastic primitive–embryonal element–eg wolffian and müllerian duct elements, which is retained after birth

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References in periodicals archive ?

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

Tumors of the spine may arise from the neural tissue, the meninges, the bone or surrounding soft tissues, or embryonal rests or as a result of derangement of embryogenesis, or they may spread from other tumors to the spine".

Subtle clinical signs of a spinal cord ependymoma at the cervicothoracic level in an adult: a case report