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Electromyography demonstrated fibrillation potentials in the adductor muscles on both sides. Pelvic radiographs showed severe osteolysis of the ischium. Gross post\u2010mortem examination following euthanasia disclosed a large retroperitoneal mass, invading the obturator foramina and compressing both obturator nerves. Histopathological examination revealed a high\u2010grade anaplastic sarcoma. Immunohistochemically, the tumour cells labelled positively for vimentin and alpha\u2010smooth muscle actin, hence the tumour was considered a \u201cmyofibroblastic fibrosarcoma\u201d. This unique case report describes a novel cause of obturator neuropathy in veterinary medicine. To date, clinical descriptions of obturator nerve lesions have been limited to pelvic fractures in small animals and following difficult labour in large animals.<\/jats:bold><\/jats:p>","DOI":"10.1111\/j.1748-5827.2012.01225.x","type":"journal-article","created":{"date-parts":[[2012,6,12]],"date-time":"2012-06-12T16:11:19Z","timestamp":1339517479000},"page":"423-427","source":"Crossref","is-referenced-by-count":3,"title":["Bilateral obturator neuropathy caused by an intrapelvic fibrosarcoma with myofibroblastic features in a dog"],"prefix":"10.1111","volume":"53","author":[{"given":"A. 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