A case is reported of a 16-year-old boy who presented with continuous
pain in his right leg. Cortical thickening and diffuse medullary scler
osis was revealed on x-ray of the distal tibia. CT imaging showed a ci
rcumscribed annular pattern extending some 2.5 cm-s and indicating the
multifocal nature of the lesion. The diagnosis of multifocal osteoid
osteoma was confirmed after histological examination of rite block of
resected bone.