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Congenital cystic adenomatoid malformation complicated by esophageal duplication cyst in a 6‐month‐old girl

We report a case of congenital cystic adenomatoid malformation (CCAM) complicated by an esophageal duplication cyst in a 6‐month‐old girl. The patient presented with recurrent pneumonia. Magnetic resonance imaging revealed two cystic lesions in the upper and lower lobes of the right lung. After cystectomy, histopathological investigation revealed that the lower cyst was a CCAM Type I, and the upper cyst was an esophageal duplication cyst.