Congenital cystic adenomatoid malformation in an adult presenting as lung abscess.

The case of a 21-year-old male with congenital cystic adenomatoid malformation is presented. His medical history started after his birth with recurrent pulmonary infections during his infancy. Lung abscess of the right lower lobe was suspected and right lower lobectomy was performed to remove a sizeable mass infiltrating the largest part of the lobe. The clinical features, diagnostic procedures, differential diagnosis, pathologic characteristics, therapeutic assessment, etiopathology and prognosis of the tumor are discussed.