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Pigmented (melanotic) schwannomas of the spinal canal.

Primary pigmented neoplasms of the nervous system are rare tumors. The literature suggests that they behave aggressively and carry a guarded prognosis. We present 2 patients with pigmented schwannomas of spinal nerves who following therapy are alive, functioning and without evidence of tumor 14 and 17 years later. We wish to emphasize that the presence of melanin alone does not equate with a malignant course. The literature is reviewed and theories of histogenesis for these unusual lesions are discussed.

Adolescent↗

Stenosis of the lumbar spinal canal in Forestier's disease.

Hyperostosis of the spine, Forestier's disease, is a rare, but well defined entity which results from silent, extensive paraspinal calcification. It has been regarded as an asymptomatic ankylosis requiring no medical or surgical treatment. Two patients with Forestier's disease are presented who show severe stenosis of the lumbar canal with early symptoms of neurological compression.

Calcinosis↗