Fetal laryngoscopy and lung biopsy in a case of bilateral lethal congenital cystic adenomatoid malformation of the lung.

A case of prenatal diagnosis of bilateral congenital cystic adenomatoid malformation of the lung (CCAM) is presented. The differential diagnosis among CCAM, pulmonary sequestration, bronchial obstruction, and laryngeal atresia is discussed. The role of diagnostic fetoscopy and fetal lung biopsy as an adjunct to ultrasound is addressed.