Pulmonary ossification is an idiopathic disorder that presents with the formation of mature bone in the pulmonary parenchyma. This is a very rare entity that occurs in conjuction with busulfan therapy as well as with a number of diseases including chronic bronchitis, cystic fibrosis, congestive heart failure, myositis ossificans, and idiopathic interstitial fibrosis. It is usually seen in older age groups. We present a 4-year-old boy with massive ossification secondary to recurrent aspiration pneumonia. This is the first reported case of pulmonary ossification secondary to recurrrent aspiration, and the first case in a child.

Keywords: pathologic ossification , lung , tomography, x-ray computed , child, preschool