[Osteoid osteoma of the hand skeleton].

Two cases of osteoid osteoma in the hand are reported. One shows a rare localisation in the trapezium. Errors in the first diagnosis and the duration of the disease emphasize the difficulties one can encounter making the correct diagnosis of this tumor. The particular symptoms of osteoid osteoma when located in cancellous bone are discussed as well as the diagnostic aids of tomography and bone scan.