ral ssBioMed CentCases Journal

Osteoid osteoma is a benign osteoblastic tumor usually seen in adolescent and young males. In the paediatric age group, since the history may be difficult to elicit, there are often problems in early diagnosis. The author reports an unusual presentation of osteoid osteoma in a ten-year-old girl, which could not be diagnosed by conventional X-rays and CT scan. Background Osteoid osteoma first described by Jaffe 1n 1935, is a benign osteoblastic tumour, mostly seen in adolescent and young males[1]. The lesions being more common in the lower extremity, children present with painful limp-ing[1]. Conventional radiographs are effective in diagno-sis, the radiological picture is of a central radiolucent area (nidus) surrounded by an area of cortical thickening. The imaging modality of choice is CT scan which is considered far superior to an MRI in diagnosis[1,2]. Tumors presen