title: Primitive neuroectodermal tumor arising in the ulnar nerve. A case report.
abstract: Malignant peripheral nerve tumors are rare. A neuroectodermal tumor arose in a 59-year-old man from the ulnar nerve. Typically, the tumor reproduces some of the appearances of cells of the primitive central nervous system. The possibility that a primary tumor of the sympathetic nervous system, especially of the adrenal glands, should be considered in the differential diagnosis. The tumor may arise from a major peripheral nerve and show features of growth patterns of the embryonic central nervous system. Blood stream spread is not uncommon; awareness of this proclivity makes early diagnosis mandatory.
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D009373:Neoplasms, Germ Cell and Embryonal / Q000473:pathology* / Q000601:surgery; D014459:Ulnar Nerve