Rare Case of Adult Congenital Cystic Adenomatoid Malformation Diagnosed with CT Perfusion Imaging and Hystological Sample

We describe the case of a 44-year-old man with congenital cystic adenomatoid malformation. Both computed tomographic (CT) scan findings with perfusion protocol and histological biopsy led to diagnosis. CT scan showed multiple terminal bronchiolar-like uniform cysts smaller than 2 cm and CT perfusion allowed to make a differential diagnosis with an usual interstitial pneumonia. In order to make a definite diagnosis, an open lung biopsy confirmed the CT findings.