The front part of the lower humerus has two projections called the trochlea and the capitulum. The capitulum is knob-shaped, and the trochlea is shaped like a spool. The borders of the distal ...

The mechanism of injury is commonly a fall on the outstretched hand with the elbow extended, with the force applied indirectly to the distal humerus, displacing it posteriorly. Posteriorly ...