Two osteoid osteomas in the same lunate

Osteoid osteoma is a small tumour, always benign, consisting of a small focus of osteoblastic hyperactivity surrounded by a zone of sclerosis. Located preferentially on the long bones, femur and tibia, carpal localisation is rare but if present it usually affects the scaphoid. We present a case of double localization of an osteoid osteoma in the lunate bone, presenting as gradually increasing pain in the wrist over the course of 18 months. Standard radiology and tomodensitometry of the wrist showed two central lucencies of the lunate without rupture of the cortex. Curettage of the lesion and packing of the resultant defect with cancellous bone resulted in disappearance of the lesions with good functional recovery. The clinical, radiological and therapeutic aspects will be discussed by the authors.