Predicting the outcome of adductor tenotomy

This study reviewed 57 hips in 30 children (8 girls and 12 boys) with cereb ral palsy who had undergone an adductor tenotomy alone or in combination wi th an anterior obturator neurectomy (23 hips). Results were evaluated by th e Reimers migration percentage (MP). The hips were split into three groups: group A (12 hips) a preoperative MP of less than 20%, group B (25 hips) be tween 20 and 40%, and group C (20 hips) more than 40%. The mean age at the time of surgery was 6 years and 1 month (range: 2.5-13 years). The mean per iod of review was 6 years and 3 months (2-20 years). The results were consi dered as "good" when radiographs at the longest follow-up showed a decrease of <10% of the MP, as "bad" when they showed an increase of >10%, and as " stable" when the MPs varied less than 10%. At the least review of group A, 11 were stable (92%) and 1 was bad. In group B, 12 were stable (48%), 7 wer e good (28%), and 6 were bad (24%). In group C, 7 were stable (35%), and 13 wee bad (65%). The preoperative migration percentage proved to be the only predictor of outcome. Age at the time of surgery and had constant signific ant effect on the outcome, neither had the addition of anterior neurectomy.