*12-year old girl with ankle pain.
What is the most likely diagnosis?
Answer
Answer: Aneurysmal bone cyst in the distal fibula
Case Discussion:
Distal tibial metadiaphyseal expansile lesion. This lesion displays multiple cysts with fluid/fluid level denoting different ages blood products.
Aneurysmal bone cyst is benign expansile osteoclastic giant cell-rich bony neoplasm, composed of numerous blood-filled channels and cystic spaces 1.
References:
1. WHO Classification of Tumours Editorial Board. WHO Classification of Tumours, 5th Edition. Soft Tissue and Bone Tumours. (2020) ISBN: 9789283245025.