Inferior vena cava gas, portal venous system gas, and pneumatosis intestinalis.

Necrotizing enterocolitis is typically found in premature neonates, but it also has been described in adults, particularly those with cirrhosis and immunocompromised. Radiographic findings of diffuse pneumatosis intestinalis and portal venous gas are characteristic of necrotizing enterocolitis. Here, we provide radiographic findings of a serious adult case of necrotizing enterocolitis. To the best of our knowledge, a wide range of portal vein and vena cava gas has never been reported.