Fibrodysplasia ossificans progressiva

Abstract

Fibrodysplasia ossificans progressiva (FOP) is a rare inherited autosomal dominant disorder characterized by congenital malformation of the big toes and progressive heterotopic ossification of the connective tissue. We report a four-year-old boy who had clinical features and radiological findings suggestive of FOP. He presented with significant decreased range of neck movement and a painful swelling in the upper paraspinal region. His radiographs showed halux valgus along with heterotopic ossification in the neck and thoracic region.