Superior Patellar Sleeve Fracture: A case report and review of the published evidence

Patellar fractures are uncommon, accounting for only 2% of all fractures [1]. Sleeve fractures were first reported in 1978 by Houghton and Ackroyd and occur predominantly in children. This fracture results in the inferior sleeve of articular cartilage being avulsed along with the periosteum and retinaculum from the patella. Inconsistently the avulsed fragment can contain a small bony component. [2,3].