Giant cell tumour of metacarpal diaphysis

A 17-year-old male presented with an expanding lump over the dorsal aspect of his hand. It was painful and tender with no history of trauma. X-rays revealed mottled, radiolucent bony lesion with the evidence of dorsal cortex destruction and prominent periosteal new bone along the metacarpal diaphysis. An MRI confirmed an expansile mass eroding the dorsal cortex of the third metacarpal shaft. The mass extended into the adjacent soft tissues. The mass was diagnosed as a giant cell tumour of the metacarpal diaphysis and managed by excisional curettage, phenolisation and cementation. Diaphyseal giant cell tumours, especially of the hand, are extremely rare.