Bone lesions in hairy cell leukemia. A case report and response of bone pains to steroids

An unusual case of hairy cell leukemia is reported. The patient experienced severe bone pains at the sites of the bone lesions caused by infiltration by hairy cells documented histologically. The pains were resistant to various analgesics. Administration of corticosteroids resulted in prompt, full, and sustained response despite the persistence of bone lesions radiographically.