Arthritis of the hindfoot revealing an intra-articular osteoid osteoma. Two case studies

Osteoid osteoma is a tumour, commonly found in the long bones. The intra-articular presentation in the hind-foot is very rare. We are reporting on two cases of intra-articular osteoid osteoma of the subtalar joint located on the calcaneus. Atypical clinical symptomatology was the reason for the delayed diagnosis. In both cases, a CAT scan of the ankle enabled a diagnosis of osteoid osteoma to be made. Open surgical resection enabled a full recovery to be achieved, with all pain being alleviated. Through these two case studies, clinical, paraclinical and therapeutic aspects of the intra-articular presentation of osteoid osteoma in the foot and ankle will be discussed.