Case 5:

A 13 year old boy with non-resolving consolidation. CT scan chest was asked for, what is the diagnosis?


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Cystic adenomatoid malformation of lung



Cystic adenomatoid malformation (CAM) of the lung is a rare congenital cystic malformation characterised by excessive overgrowth of terminal respiratory structures resulting in the formation of various sized inter communicating cysts. CAM has been divided into 3 groups depending upon the size of the cysts.

Type I: single or multiple large cysts greater than 2 cm in diameter

Type II: multiple small cysts less than 1 cm in diamater.

Type III: a large bulky microcystic lesion which often produces mediastinal shift

Associated abnormalities noted are polyhydramnios and fetal hydrops (antenatally). Fetal hydrops is believed to occur in large masses which compress the inferior vena cava.



Dr Ashok Raghavan, Manipal, Karnataka