Muscle herniation is defined as a protrusion of muscle through an acquired or congenital defect of enclosing
fascia. There have been 19 cases of symptomatic forearm muscle herniation reported in the literature. In this
article we present a case of a 26-year-old factory worker who developed a traumatic forearm muscle herniation
diagnosed on ultrasound and MRI, and we review the imaging of muscle hernias.