{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T11:10:06Z","timestamp":1756379406819,"version":"3.44.0"},"reference-count":16,"publisher":"BMJ","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BMJ Case Reports"],"abstract":"<jats:p>A girl with known proximal femoral focal deficiency presented with Perthes\u2019 disease at 5\u2005years of age. Her treatment involved a Salter osteotomy. This in conjunction with articular incongruence, due to deformity of the femoral head, resulted in mixed type femoroacetabular impingement when she was 10\u2005years old. Surgical hip dislocation and femoral neck osteochondroplasty successfully relieved her symptoms of impingement. This is the first reported case of Perthes\u2019 disease in a patient with proximal femoral focal deficiency. The case highlights the importance of thoroughly investigating pain in patients with proximal femoral focal deficiency, a condition which is normally painless. Timely diagnosis of Perthes\u2019 disease and containment procedures can prevent collapse of the femoral head and the resultant sequelae. Acetabular over-coverage should be avoided in pelvic osteotomy to prevent the development of femoroacetabular impingement.<\/jats:p>","DOI":"10.1136\/bcr-2012-006748","type":"journal-article","created":{"date-parts":[[2012,11,12]],"date-time":"2012-11-12T12:15:31Z","timestamp":1352722531000},"page":"bcr-2012-006748","source":"Crossref","is-referenced-by-count":1,"title":["Perthes\u2019 disease and femoroacetabular impingement in a child with proximal femoral focal deficiency"],"prefix":"10.1136","volume":"2012","author":[{"given":"Terence","family":"Pun","sequence":"first","affiliation":[{"name":"Department of Orthopaedics and Traumatology, Queen Mary Hospital, Hong Kong"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Oliver M","family":"Stokes","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, The Duchness of Kent Children's Hospital, Hong Kong"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wang","family":"Chow","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, Queen Mary Hospital, Hong Kong"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael","family":"To","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, The Duchness of Kent Children's Hospital, Hong Kong"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2012,11,12]]},"reference":[{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.1","first-page":"1306","article-title":"Congenital short femur with fibular hemimelia","volume":"56-A","author":"Aitken","year":"1974","journal-title":"J Bone Joing Surg"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.2","doi-asserted-by":"crossref","first-page":"1432","DOI":"10.2106\/00004623-200010000-00010","article-title":"Multiplier method for predicting limb length discrepancy","volume":"82","author":"Paley","year":"2000","journal-title":"J Bone Joing Surg Am"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.3","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1097\/01241398-199203000-00001","article-title":"The lateral pillar classification of Legg-Calve-Perthes disease","volume":"12","author":"Herring","year":"1992","journal-title":"J Pediatr Orthop"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.4","first-page":"577","article-title":"On coxa plana: osteochondritis deformans coxae juveniles: Legg's disease, maladie de Calv\u00e9, Perthes Krankreit","volume":"55","author":"Waldenstr\u00f6m","year":"1922\u20131923","journal-title":"Acta Chir Scand"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.5","doi-asserted-by":"crossref","first-page":"900","DOI":"10.2106\/00004623-198163060-00006","article-title":"Epiphyseal extrusion as a prognostic index in Legg-Calve-Perthes disease","volume":"63","author":"Green","year":"1981","journal-title":"J Bone Joint Surg Am"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.6","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1016\/S0030-5898(20)31500-5","article-title":"Legg-Calv\u00e9- Perthes disease: treatment and prognosis","volume":"11","author":"Griffin","year":"1980","journal-title":"Orthop Clin North Am"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.7","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-197401000-00009"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.8","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1097\/01.blo.0000096804.78689.c2","article-title":"Femoroacetabular impingement: a cause for osteoarthritis of the hip","volume":"417","author":"Ganz","year":"2003","journal-title":"Clin Orthop Relat Res"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.9","doi-asserted-by":"publisher","DOI":"10.1159\/000235884"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.10","first-page":"63","article-title":"Legg-Calv\u00e9-Perthes\u2019 disease in southern Chinese children","volume":"15","author":"Thompson","year":"1978","journal-title":"J West Pacific Orthop Assoc"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.11","doi-asserted-by":"crossref","first-page":"563","DOI":"10.1097\/01241398-199109000-00001","article-title":"Soft tissue anatomy of proximal femoral focal deficiency","volume":"11","author":"Pirani","year":"1991","journal-title":"J Pediatr Orthop"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.12","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.H.00902"},{"key":"2025082803290157000_2012.nov09_1.bcr-2012-006748.13","unstructured":"Westin GW Gunderson FO . Proximal focal femoral deficiency: a review of treatment experience. In: Aitken GT. Proximal focal femoral deficiency: a congenital anomaly . 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