Radial Collateral Ligament Sprain/Strain
The lateral collateral ligament of the elbow, also called the radial collateral ligament, is located on the outside or thumb side of the elbow and prevents medial (inside) to lateral (outside) translation of the elbow. A sprain refers to an injury of a ligament and typically occurs due to stretch or trauma which causes overstretching and possible tearing of the ligamentous fibres. Radial collateral ligament sprains are typically caused by direct injury such as a direct blow, forced twisting of the elbow and from falling onto an outstretched hand and are typically associated with fracture or dislocation of the elbow. Lateral collateral ligament sprains typically present as pain on the lateral aspect of the elbow, swelling, bruising, malformation (if dislocation or fracture is present) and varus (an inside to outside force) laxity.