Placental transmogrification of the lung presenting as a peripheral solitary nodule in a male with the history of trauma: A case report

Rationale: Placental transmogrification of the lung is a very rare lesion which was characterized by the presence of papillae resembling placental villi. Its pathogenesis still remains unclear. Some authors think that this lesion is congenital and related to hamartoma, and others advocate it is secondary change after emphysema. So far, the majority of reported cases manifested as bullous lesions, to our knowledge , only two cases presented as a solitary nodule.