The paper presents the clinical case of a 14-y.old female patient complaining on omalgia, in whom a focus of osteoid osteoma was diagnosed, localized in the acromion. The lesion was removed using the arthroscopic technique, achieving a complete disappearance of ailment.

Note Osteoid osteoma (OO) is defined as a benign boneforming tumour characterized by small size, limited growth potential and disproportionate pain (WHO, 2002). Usually, OO is solitary, although the literature shows few reports of multiples lesions in the same patient, but not concomitant. In most cases, OO patients complain of severe nocturnal pain that usually responds to salicylates and nons...

Osteoid osteoma is a small tumor, always benign. Located preferentially on the long bones, femur and tibia, elbow location is rare. We present a case of an Osteoid osteoma in unusual subperiostal localization in the tip of the coronoid process. The lesion was removed by en bloc resection under CT-guidance. This approach enabled us to avoid damaging the proximal structures, to examine the lesion...