Clinical and Anatomical Considerations for Management of a Complete Tear of the Distal Rectus Femoris Myotendinous Junction: A Rare Knee Extensor Mechanism Injury.

The knee extensor mechanism is a highly complex multilayered and reinforced structure. Quadriceps muscle injuries are considered to be common, particularly among athletes; however isolated rectus femoris injuries involving the distal myotendinous junction are considered to be exceedingly rare with very few case reports published to date. Thus, the presentation and diagnosis of this injury can be elusive and treatment is nonuniform. There is limited literature published advocating both nonsurgical and surgical management. We illustrate the clinical and radiologic presentation of a traumatic, nonsport-related distal rectus femoris muscle injury treated operatively. The presentation of this injury along with anatomical and clinical considerations is portrayed in detail. This case report contributes to the sparse literature regarding this injury and delineates management considerations.