CT and histopathological correlation of congenital cystic pulmonary lesions: a common pathogenesis?

Clinical Radiology
N GriffinS Padley

Abstract

To determine whether similarities exist in both the imaging and histopathological features of congenital cystic lung lesions and whether a more appropriate classification would be to adopt the theory of "malinosculation". From the histopathology and computed tomography (CT) database, 24 patients (16 male, median age 3 years) with congenital cystic lung lesions were identified. CT studies were reviewed for site and characteristics of the lesions, parenchymal features, bronchial anatomy, and the presence of a feeding systemic vessel. Individual histopathological parameters were also correlated with CT data. There were five type 1 congenital cystic adenomatoid malformations (CCAMs), six type 2 CCAMs, one type 4 CCAM, one bronchial atresia, four pleuropulmonary blastomas (PPBs), and seven sequestrations. CCAMs (types 1, 2 and 4), sequestrations and PPBs appeared as cystic lesions, with cyst size less than 2 cm in type 2 CCAMs. Sequestrations were distinguished radiologically from CCAMs by systemic vessels. Reduced pulmonary attenuation was seen in bronchial atresia, type 2 CCAMs and in sequestrations. Histopathology showed an overlap in entities with sequestrations demonstrating CCAM type 2 histology and segmental atresia noted in ...Continue Reading

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