abnormal lung development abnormal lung bud morphology 2011-03-04T02:58:37Z MP:0010906 MPheno.ontology abnormal lung buds abnormal primary lung bud morphology abnormal tracheal bud morphology any structural anomaly of the primary outgrowth of the embryonic trachea i.e. blunt end of the respiratory diverticulum which grows ventrally out of the proximal end of the foregut, then extends caudally and divides into two, forming the anlage of a primary bronchus and all its branches csmith