Kieffer F, Ferrière A, Magny J F, Coatantiec Y, Revillon Y, Voyer M
Service de réanimation néonatale, institut de Puériculture de Paris, France.
Arch Pediatr. 1996 May;3(5):470-2. doi: 10.1016/0929-693x(96)86408-6.
Cystic adenomatoid malformation, a rare pulmonary malformation, usually appears as a cystic mass, radiologically. It may be infected and confusion has also arisen in distinguishing it from pneumonia with pneumatoceles.
A full-term boy suffered from severe neonatal respiratory distress. Pregnancy had been uneventful despite the fact that his mother had insulin-dependent diabetes. Prenatal ultrasonographies did not reveal any abnormality. On day 2, X-rays showed a right pulmonary mass that appeared solid. The patient was treated for E Coli sepsis. Subsequently, the pulmonary mass became lacent, cystic, fluid-filled, resembling an abscess; the CT scan confirmed these features. As the lesion increased in volume, a limited resection was performed. Histologic examination showed adenomatoid proliferation of bronchiolar elements with formation of cysts and necrosis.
Infection of cystic adenomatoid malformation may supervene the first days of life resulting in a lung abscess appearance.
