Aneurysmal bone cyst
Aneurysmal bone cyst is characterized by pain and inflammation, usually at a single site. Depending on the location and size of the cyst, signs and symptoms may include swelling, limping, pathologic fracture, mild hemorrhaging, or neurologic findings.
The aggressive nature of the aneurysmal bone cyst bears a marked similarity to a malignant bone tumor such as hemorrhagic osteosarcoma or Ewing sarcoma. Caution is advised to rule out malignancy, and to consider other benign bone lesions such as giant cell tumor of bone or unicameral bone cyst. Fibrous dysplasia, chondroblastoma, osteochondroma, or chondromyxoid fibroma may appear concurrently.
Untreated, aneurysmal bone cyst continues to enlarge and may destroy bone. Management includes embolization, curettage, excision, bone graft, cortical windowing, cryotherapy, and cauterization. Excised aneurysmal bone cysts have been shown to recur in up to 50% of cases. Radiation therapy is not advised.
M85.50 – Aneurysmal bone cyst, unspecified site
203468000 – Aneurysmal bone cyst