Two cases of avulsion fracture of the anterior inferior iliac spine are reported. One was a missed diagnosis that resulted in exostosis formation needing excision. The second case was an adolescent with significant displacement of the fragment and a primary open reduction and internal fixation was done. A high index of suspicion is necessary to diagnose this relatively rare injury and surgery has a role in carefully selected cases.Résumé Deux cas d'avulsion-fracture de l'épine iliaque antéro-inférieure sont rapportés. Dans un cas ou le diagnostic n'a pas été fait l'évolution s'est fait vers une ossification qui a nécessité une exérèse. Le deuxième cas était un adolescent avec une fracture à grand déplace-ment et une réduction ouverte et fixation interne a été faite. Un haut index de soupçon est nécessaire pour diagnostiquer cette lésion relativement rare et la chirurgie a un rôle dans certains cas sélectionnés.

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We report the outcome of 135 knees with anteromedial osteoarthritis in which the Oxford meniscal-bearing unicompartmental arthroplasty was inserted in a district general hospital by a single surgeon. All the knees had an intact anterior cruciate ligament, a correctable varus deformity and the lateral compartment was uninvolved or had only minor osteoarthritis. The mean follow-up was 5.82 years (2 to 12). Using revision as the end-point, the outcome for every knee was established. Five knees have been revised giving a cumulative rate of survival of the prosthesis at ten years of 94.04% (95% confidence interval 84.0 to 97.8). Knee rating and patient function were assessed using the modified Knee Society scoring system. The mean knee score was 92.2 (51 to 100) and the mean functional score 76.2 (51 to 100). The survival of the implant is comparable to that reported by the designers of the prosthesis and not significantly different from that for total knee replacement. Unicompartmental knee replacement offers a viable alternative in patients with medial osteoarthritis. Appropriate selection of patients and good surgical technique are the key factors.

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