A 71/2 months old child with cough, mild stridor was staed on oral antibiotics. The child showed initial improvement but later developed wheeze, productive cough, and mild fever. X-ray shows hyperlucency and PFT shows an obstructive curve. The most probable diagnosis is:
Bronchiolitis obliterans
Post viral syndrome
Follicular bronchitis
Pulmonary alveolar microlithiasis
The patient in question is presenting with charachteristic features of bronchiolitis obliterans. Fever, cough, and wheeze are common clinical features of bronchiolitis obliterans and a period of initial improvement may well be seen in cases of bronchiolitis obliterans (Initial sign of B.O). Hyperluscency or chest X-Ray and obstructive curve on pulmonary function tests fuhur suggest the diagnosis of bronchiolitis obliterans. Ref: Nelson 18th Edition, Page 1782