title: Paraganglioma of the filum terminale.
abstract: An unusual tumor arising in the filum terminale is described. The clinical data revealed an extensive and slowly growing lesion. The histologic picture was characterized by a proliferation of lobules and sheets of regular cells within a rich vascular network. Electron microscopic studies showed light and dark cells with sustentacular extensions. Typical neurosecretory granules were observed in both cell types, establishing the diagnosis of para-ganglioma. The glomus coccygeum could be the site of this tumor.
mesh_terms: D002420:Cauda Equina; D006801:Humans; D008297:Male; D008875:Middle Aged; D010235:Paraganglioma / Q000473:pathology*; D013120:Spinal Cord Neoplasms / Q000473:pathology*