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However, its occurrence in ochronotic spine has not been reported previously.<\/jats:p>\n<jats:p>Evaluation of progressive paraparesis in a 68-year-old man with ochronosis revealed pseudarthrosis at the T11\u201312 level. Circumferential dural sac decompression, debridement of the disc space, interbody fusion, and screw-rod fixation were all done via a posterior-only approach. Postoperatively the patient exhibited a marked recovery in terms of pain and neurological status. At the 3-month follow-up, he was able to walk independently.<\/jats:p>\n<jats:p>Ochronosis should be included in the etiology of pseudarthrosis. With aggravation of back pain and the appearance of neurological deficits in an already stable patient with any ankylosing disease, pseudarthrosis should be suspected. Furthermore, single-stage, 360\u00b0, posterior-only surgery may obviate the need for single-stage or staged anterior-posterior surgical intervention in patients with pseudarthrosis of the thoracic and lumbar spine.<\/jats:p>","DOI":"10.3171\/2016.5.spine15671","type":"journal-article","created":{"date-parts":[[2016,10,14]],"date-time":"2016-10-14T14:02:30Z","timestamp":1476453750000},"page":"220-228","source":"Crossref","is-referenced-by-count":5,"title":["Symptomatic pseudarthrosis in ochronotic spine: case report"],"prefix":"10.3171","volume":"26","author":[{"given":"Abolfazl","family":"Rahimizadeh","sequence":"first","affiliation":[{"name":"Pars Advanced and Minimally Invasive Manners Research Center, Pars Hospital, Iran University of Medical Sciences, Tehran, Iran; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Housain","family":"Soufiani","sequence":"additional","affiliation":[{"name":"Pars Advanced and Minimally Invasive Manners Research Center, Pars Hospital, Iran University of Medical Sciences, Tehran, Iran; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Valliolah","family":"Hassani","sequence":"additional","affiliation":[{"name":"Pars Advanced and Minimally Invasive Manners Research Center, Pars Hospital, Iran University of Medical Sciences, Tehran, Iran; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ava","family":"Rahimizadeh","sequence":"additional","affiliation":[{"name":"Birmingham Medical School, Birmingham, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"key":"b1-spine15671","series-title":"J Bone Joint Surg Am","doi-asserted-by":"publisher","first-page":"817","DOI":"10.2106\/00004623-196042050-00009","article-title":"Thirteen cases of alkaptonuria from one family tree with special reference to osteoarthrosis alkaptonurica","volume":"42-A","author":"Abe Y,","year":"1960","unstructured":"Abe Y, Oshima N, Hatanaka R, Amako T, Hirohata R: Thirteen cases of alkaptonuria from one family tree with special reference to osteoarthrosis alkaptonurica. 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