Objective: Extralobar intraabdominal pulmonary sequestrations are rare congenital malformations which are characterized by disorganized and nonfunctioning pulmonary parenchyma. These lesions have no communication with the bronchial tree and pulmonary arteries. They receive their blood supply from the systemic circulation. Method: We describe a 5 days old male infant admitted to the hospital with a left subdiaphragmatic, 50×40×35 mm, hiperechogenic and, solid mass that was identified during ultrasonography on the 26th week of gestation.