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Magnetic resonance imaging suggested thickening of the sciatic nerve at and distal to the sciatic notch. At operation the nerve showed extrinsic and intrinsic abnormality, proven to be endometriosis. Her symptoms improved, and she began gonadotropin-releasing hormone agonist therapy for further suppression. This very unusual case shows that endometriosis can affect the sciatic nerve over a range of territory inside and outside the pelvis, and that surgery must be appropriately directed to avoid negative exploration. Surgical decompression achieves good relief of symptoms, and medical therapy also allows sustained suppression of this disease.<\/jats:p>","DOI":"10.3171\/2010.10.spine09162","type":"journal-article","created":{"date-parts":[[2010,12,24]],"date-time":"2010-12-24T14:59:14Z","timestamp":1293202754000},"page":"281-289","source":"Crossref","is-referenced-by-count":41,"title":["Cyclic sciatica from extrapelvic endometriosis affecting the sciatic nerve"],"prefix":"10.3171","volume":"14","author":[{"given":"John R.","family":"Floyd","sequence":"first","affiliation":[{"name":"Departments of Neurosurgery,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elizabeth R.","family":"Keeler","sequence":"additional","affiliation":[{"name":"Gynecological Oncology, and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elizabeth D.","family":"Euscher","sequence":"additional","affiliation":[{"name":"Pathology, The University of Texas M. D. 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