Unusual Presentation Of An Aneurismal Bone Cyst In The Patella With Fracture – A Case Report

We report about a 25-year old man having an aneurysmal bone cyst in the patella presenting with fracture after falling from a height of 3 feet. He was asymptomatic before the fall. He was treated with curettage, bone grafting and internal fixation using tension band wire technique. Bone cysts are very unusual in the patella. Around 1% of primary bone tumours are aneurysmal bone cysts.(1) They are common in metaphyses of long bones of the lower extremity. Less than 1% of aneurysmal bone cysts occur in the patella.