Subchondral Osteoid Osteoma of a Metatarsal Bone: An Uncommon Variant in an Unusual Location

Osteoid osteoma (OO) is a benign bone-forming lesion leading to classical symptoms in the form of pain that aggravates during the night and is relieved by the treatment with salicylates. It constitutes 10% of benign skeletal neoplasms and is seen most often in males between the age group of 7 and 25 years. We report a rare case of subchondral OO of a metatarsal bone with unusual imaging features. This case illustrates the limitations of various imaging modalities in the diagnosis of bone tumors and the need for biopsy and histopathological analysis in difficult cases.