The Vanishing Leg Swelling: A Rare Case of Muscle Herniation

Abstract

Muscle hernias of the lower limb are rare clinical entities resulting from focal defects in the deep fascia that permit protrusion of underlying muscle fibers. They are frequently underdiagnosed because of intermittent presentation and nonspecific findings. We report a case of a 34-year-old male with symptomatic tibialis anterior muscle herniation presenting as an intermittent swelling over the left shin. Dynamic ultrasonography demonstrated a 2 cm fascial defect with muscle protrusion during contraction. The patient underwent primary fascial repair with 2-0 polypropylene sutures. Postoperative recovery was uneventful, and no recurrence was noted at three months. This case highlights the importance of dynamic imaging, appropriate defect size assessment, and individualized surgical planning. A brief review of etiology, classification, and treatment strategies is discussed.