Coccygectomy for instability of the coccyx.

Between 1993 and 2000, 61 patients with instability-related coccygodynia were operated on by a single surgeon using the same technique. There were 49 women and 12 men, mean age 45.3 (18-72) years. Twenty-seven patients had hypermobility of the coccyx and 33 subluxation. In all cases, the unstable portion was removed through a limited incision directly over the coccyx. The outcome was assessed using a detailed questionnaire. Follow-up was between 12 months and more than 30 months. The outcome was rated excellent or good in 53 patients, fair in one, and poor in seven. There were nine patients with infection requiring reoperation.