Background: Osteoid osteomas are benign lesions of osteoblastic activity. These are frequently found in many instances where there is pain of unexplainable background. But many a times the entity is found as incidental finding while the patient is being evaluated for some other reason. Case presentation: We present 15 years old boy who reported for backache of two months duration. This used to get worsened at night time and with some relief with non-steroid anti-inflammatory drugs (NSAID). Plain X-ray did not show any abnormality. The child underwent magnetic resonance imaging (MRI) which has given some clue for further evaluation by non-contrast computerized tomography (NCCT) of lumbosacral region. This had brought out the diagnosis which was subsequently confirmed by radio-nuclear studies. Conclusion: Pediatric age group backache is a rare phenomenon and thorough search is required to investigate the cause. Various imaging modalities often locate the pathology if evaluated properly. This helps in the management of the case.

Keywords: Osteoid osteoma, case report, backache, NSAID, MRI, NCCT