CYSTIC ADENOMATOID MALFORMATION OF THE LUNG

MORPHOLOGIC ANALYSIS

¹ Chief, Musculoskeletal and Genitourinary Radiologic Pathology Branches, Armed Forces Institute of Pathology, Washington, D.C.
² Staff Pathologist, Department of Pediatric and Hepatic Pathology, Armed Forces Institute of Pathology, Washington, D.C.
³ Chief, Department of Diagnostic Radiology, Walter Reed Army Medical Center, Washington, D.C.

Thirty-one cases of cystic adenomatoid malformation were reviewed at the Armed Forces Institute of Pathology.

Of this group 15 had roentgenograms.

The most common roentgen pattern is that of a multicystic lucent lesion with cyst expansion and mediastinal shift. The cyst walls are usually thick with some variation and are composed of small nonexpanded adenomatoid cysts, alveoli, blood vessels and atelectatic areas. These cysts commonly contain fluid at gross cutting and often demonstrate air-fluid levels on roentgenograms.

Respiratory distress is related to the degree of lung involvement and expansion of the adenomatoid cysts.

The roentgenologist and pediatrician play a significant role in patient management through accurate diagnosis, since infant survival depends on subsequent prompt surgical removal of the affected lung tissue.

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