Objective To investigate the clinicopathologic features of congenital cystic adenomatoid malformation(CCAM) of lung in adults.Methods The clinical and pathological characteristics of two cases of CCAM of lung in adults from November 19,2012 to February 12,2014 were analyzed,and relevant literatures were reviewed.Results Both of the two patients were males who were 59 years and 60 years old respectively.Both of them presented with respiratory symptoms such as productive cough,hemoptysis and fever.The lesions...