[Congenital cystic adenomatoid malformation: a case report].

Cystic adenomatoid malformation is a rare pulmonary hamartomatous lesion, of an unknown etiology. Report a singular case of CAM of one newborn, with marked respiratory distress. Using different method (chest X-ray, Multidetector row CT associated at multiplanar and three-dimensional reconstructions), we obtained an accurate diagnosis of site and nature, critical for a correct therapeutic approach.