[Postnatally acquired pulmonary cyst: differential diagnosis of pediatric cystic pulmonary lesions]. / Postnatal erworbene Lungenzyste. Differenzialdiagnosen zystischer Lungenläsionen im Kindesalter.

ABSTRACT

BACKGROUND: Differential diagnosis of infantile pulmonary cysts comprises congenital cystic lesions (including foregut cysts) and pneumatoceles (i.e., pulmonary cysts of acquired, inflammatory or traumatic origin). CASE We report the resection of a subpleural air-filled lung cyst of 4 cm in a former preterm (33rd week of pregnancy) at the age of 8 months that was first diagnosed 7 days postnatally by chest X-ray. Pneumatocele was diagnosed pathomorphologically. CONCLUSION: In children, most pneumatoceles are caused by trauma or pneumonia. In the case described, disruption of subpleural alveolar walls due to high pressure ventilation is the likely cause. Differential diagnoses are discussed.