DOI: https://doi.org/10.36347/sjmcr.2026.v14i06.035

Pages: 1466-1469

Bone lesions of the hand are rare in children. Among them, aneurysmal bone cyst is a benign, expansile, osteolytic lesion that may mimic a locally aggressive process. We report the case of an 8-year-old child investigated for swelling of the dorsal aspect of the right hand evolving over one month. Plain radiography showed an osteolytic lesion of the second metacarpal with focal cortical breakthrough. MRI demonstrated a well-defined multiloculated mass centered on the second metacarpal, composed of multiple septated cystic cavities with fluid-fluid levels. The lesion showed heterogeneous low signal intensity on T1-weighted images, heterogeneous high signal intensity on T2/proton density fat-suppressed sequences, and peripheral and septal enhancement after gadolinium administration. These findings were primarily suggestive of an aneurysmal bone cyst. Through this case, we highlight the role of MRI in lesion characterization, locoregional staging, and diagnostic orientation of pediatric bone tumors of the hand.