Osteoid osteoma (some diagnostic problems).
D000293:Adolescent; D001859:Bone Neoplasms / Q000000981:diagnostic imaging*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D010017:Osteoma, Osteoid / Q000000981:diagnostic imaging*; D011859:Radiography