Department of Orthopaedics, University of Utah, Salt Lake City, Utah.
JBJS Case Connect. 2021 Oct 27;11(4):01709767-202112000-00032. doi: e21.00481.
A 13-year-old boy sustained an acute, grade III medial collateral ligament (MCL) distal periosteal avulsion injury while playing noncontact football. Treatment consisted of diagnostic knee arthroscopy with open physeal-sparing MCL repair. At approximately 1-year follow-up, new development of genu valgum in the operative extremity was noted. After 8 months of nonoperative treatment with deformity progression, the patient underwent correction with proximal medial tibial hemiepiphysiodesis.
Although Cozen's phenomenon commonly occurs after a proximal metaphyseal tibial fracture in children aged 2 to 7 years, it can occur as a rare complication of MCL injury/repair and remains a possible outcome in skeletally immature patients.
一名 13 岁男孩在踢非接触式足球时发生急性 III 度内侧副韧带（MCL）远端骨膜撕脱伤。治疗包括膝关节镜检查和开放性骺板保存的 MCL 修复。在大约 1 年的随访中，发现手术肢体出现新的外翻畸形。在经过 8 个月的非手术治疗且畸形进展后，患者接受了近端内侧胫骨半骺阻滞术矫正。
尽管 Cozen 现象常见于 2 至 7 岁儿童的胫骨近端干骺端骨折，但它也可能是 MCL 损伤/修复的罕见并发症，并在骨骼未成熟的患者中仍然是一种可能的结果。
