Introduction: Split tears of the peroneus brevis tendon (PBT), often associated with superior peroneal retinaculum (SPR) insufficiency, are a frequently overlooked cause of posterolateral ankle pain and instability, particularly in athletes. Accurate diagnosis requires a high index of suspicion and dynamic imaging to detect tendon subluxation and associated pathology. Case Report: We present the case of a 28-year-old athlete with persistent posterolateral ankle pain and instability following an ankle twist. Clinical examination and imaging confirmed a partial longitudinal tear of the PBT with concomitant SPR insufficiency. Surgical management involved tendon debridement, tubularization with side-to-side repair, and SPR reconstruction. Post-operative rehabilitation included progressive weight-bearing, range-of-motion exercises, and structured strengthening protocols. Conclusion: The patient achieved excellent recovery, with an American Orthopaedic Foot and Ankle Society Ankle-Hindfoot Score of 85 at 3 months and a full return to sports without pain or instability. This case highlights the importance of early recognition and comprehensive management of both tendon and ligament pathology to achieve optimal functional outcomes. Keywords: Peroneus brevis tendon, ankle instability, superior peroneal retinaculum, tendon repair, rehabilitation.
Rajamanya et al. (Thu,) studied this question.