“…Association of tracheobronchomegaly with emphysema has been reported only sporadically in literature. 4 There are meagre differentials, which can be considered in these scenarios, namely connective tissue disorders like Ehlers-Danlos syndrome, Marfan's syndrome and alpha-1 antitrypsin deficiency. Once all these causes of emphysema are excluded, then it can be said to be secondary to MKS.…”