Vol. 6, Issue 1 (2020)

Introduction: Patella is an uncommon site for primary tumour of bone. Aneurysmal bone cyst account for 1 % of any primary bone lesion and its occurrence in patella is very rare.

Material and method: A case report of 20 years old male patient came with complain of pain in right knee joint with swelling from last 1 year with no history of trauma. On examination there was localised tender swelling present in the anterior aspect of knee over patella with full range of movement. On investigating routine investigations were unremarkable. X-ray right knee joint shows expansile osteolytic lesion with cortical thinning. MRI shows a large cyst with fluid level suggestive of aneurysmal bone cyst. 3 injections of 2ml of 3% polidocanol given 1 month apart intralesionally under fluoroscopy guidance. Clinical, functional and radiological follow-up for 3 consecutive months was done.

Discussion: Percutaneous sclerotherapy with 3% polidocanol is a safe alternative to conventional surgery for the treatment of Aneurysmal bone cyst.

Conclusion: Percutaneous sclerotherapy is emerging as an excellent method of treatment for aneurysmal bone cyst, and obviates the potential functional disabilities with other method of treatment.