Giant cell tumour of the proximal end of the ulna.

An extremely rare case of giant cell tumour of the proximal end of the ulna, which was clinically aggressive but histologically benign, is reported in a 28-year-old man. The tumor was excised in en bloc but patient died 8 months after surgery. To the best of our knowledge, this is the first reported case from South East Asia and the second available in the English-language literature. It therefore warrants report.