Orthopedics & Rheumatology - Juniper                                             Publishers Summary Introduction: Palmer and Pellegrini-Stieda disease are rare complications of traumatic rupture of the medial collateral ligament of the knee with a different behavior. Objective: To assess the pathophysiology, clinical, radiological, arthroscopic picture, and treatment of two late complications of traumatic injury to the internal collateral ligament of the knee. Method: The search and analysi