Osteoidt osteom i phalanx distalis af en førstefinger

We present a rare case of osteoid osteoma in the distal phalanx of the thumb. Symptoms had started seven months prior with pain and swelling and later progressed to enlargement of the nail. The patient lacked the classic symptoms of nocturnal pain and relief from NSAID. The ostoid osteoma was located in relation to the physis and was on the initial X-rays believed to be normal closure of the physis. MRI showed abnormality but the CT scan gave the right diagnosis and was used to plan en-bloc surgery.