Abstract
Muscle herniations occur through acquired fascial defects in the lower extremities; upper-extremity herniations are rare. The affected patients are typically adult men engaging in strenuous exercise or with injury; pediatric cases are infrequent. We a pediatric patient with a symptomatic, forearm herniation treated with fascial defect closure using an acellular dermal allograft. This case report highlights not only the presence of this rare condition in pediatrics but also a safe and viable treatment option for this patient population. The patient presented with pain and soft-tissue swelling of the forearm, was diagnosed with muscular herniation, and was surgically treated with fascial defect closure using an acellular dermal allograft. All symptoms resolved, without the recurrence of herniation and with return to sport. Upper-extremity muscle herniations are rare but should be considered in pediatric patients following trauma/surgery and can be treated successfully with acellular dermal allografts.