Congenital cystic adenomatoid malformation of the lung. Report of a case with cytologic findings.

We present the cytologic findings in a case of congenital cystic adenomatoid malformation (type II) of the lung in a newborn infant. The patient's condition was initially diagnosed in utero as a diaphragmatic hernia. Upon delivery, she underwent immediate laparotomy, which revealed no diaphragmatic hernia but rather a cystic mass in the left lung. She subsequently developed mediastinal shift and severe respiratory distress. A chest tube was inserted, the left cystic mass aspirated, and the fluid was examined cytologically. Due to persistent respiratory compromise, she underwent thoracotomy with resection of the cystic left lung.