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Findings and Management of the Rare Caput Flexum Deformity of the Hip

A Case Report

Leunig, M. MD1; Fickert, S. MD2,3; Ganz, R. MD4

doi: 10.2106/JBJS.CC.18.00321
Case Reports

Case: A 10-year-old girl presented after possible occult hip trauma, with shortening of the leg being the initial clinical symptom, followed by motion-dependent pain. She had limited external rotation in extension with anterior apprehension. Radiographically, the deformity was an anterior tilt of the epiphysis with coxa vara. Surgery included surgical dislocation using a retinacular flap for the anterior open wedge femoral neck osteotomy for extension and posterior translation, with an excellent 4.5-year clinical outcome.

Conclusions: Caput flexum is a rare deformity with localized premature closure of the anterior growth plate of the hip. To avoid secondary impingement, an osteotomy was successfully placed close to the deformity.

1Department of Orthopedics, Schulthess Clinic, Zurich, Switzerland

2Hüftchirurgie, Sportorthopaedicum Straubing, Straubing, Germany

3Department of Orthopedics, University Medical Centre Mannheim, University of Heidelberg, Heidelberg, Germany

4Faculty of Medicine, University of Bern, Bern, Switzerland

E-mail address for M. Leunig:

Investigtaion performed at the Department of Orthopedics, Schulthess Clinic, Zürich, Switzerland

Disclosure: The Disclosure of Potential Conflicts of Interest forms are provided with the online version of the article (

Copyright © 2019 by The Journal of Bone and Joint Surgery, Incorporated
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