What is the Functional Role of Obturator Externus Muscle? The Case of a Moderate Tear in a Professional Soccer Player: A Case Report.

The obturator externus muscle is a pelvic and hip muscle with a complex anatomical arrangement, which is involved in hip stability. This paper presents a new case of an obturator externus muscle tear in a professional soccer player, offering valuable insights into the clinical presentation, diagnostic challenges, and successful conservative management. Additionally, a comprehensive review of the literature on this topic is presented. A 21-year-old player reported anterior hip and adductor discomfort after a game, with no recollection of a specific traumatic event. Clinical examination revealed tenderness and limited range of motion during external hip rotation with flexion. Ultrasonography was inconclusive, but magnetic resonance imaging showed a partial obturator externus muscle tear. The athlete was submitted to a structured exercise program and, despite the injury, continued training and playing without functional limitations. The magnetic resonance imaging, performed after 35 days, revealed a complete recovery. This paper highlights the rarity of obturator externus muscle tears, their potential underreporting, and the diagnostic value of magnetic resonance imaging in identifying these deep-seated injuries. Importantly, the player's rapid recovery and ability to continue playing suggest that conservative management can lead to excellent functional outcomes. The possible reasons explaining the complete recovery, including the role of this muscle in hip stability and individual anatomical variations, are discussed.