Florid bronchial cartilage ossification: a case report with literature revisited.

Pulmonary ossification is a rare phenomenon which has been observed in the lungs of patients with chronic obstructive pulmonary disease, pulmonary fibrosis, and tuberculosis. It has also been observed as a part of aging process. Approximately 130 cases of pulmonary ossification have been reported in literature so far. We report here an unusual autopsy case of bone and bone marrow metaplasia in the bronchial wall and discuss theories related to the development of metaplastic ossification.