Congenital lung cysts :
Congenital lung cyst is also a rare condition, which presents in the neonatal
period. It was first described by Stock in 1897. The etiology of this condition
is not known. But it is recognized by the absence of bronchotubular glands and
cartilage and the presence of tall columnar mucinous epithelium. There is overproduction
of luminal bronchiolar structure in the form of cysts of various size. These
present as respiratory distress of various degrees. Sometimes, there may not
be any symptoms for as long as 5 to 6 months. Normally male babies are affected
more often than female.
It is usually unilateral affecting the left upper lobe followed by the right
middle and right upper lobes. Involvement of more than one lobe is rare. Similarly
involvement of lower lobe is also extremely rare. The differential diagnosis
was CLE, congenital diaphragmatic hernia (CDH), pneumothorax and lung cyst.
Chest X-ray of shows hyperlucency on the affected side with multiple cystic
shadows.