Bulla of the Lung

¹ Mont Alto Sanatorium.

Bulla is a pathological entity caused by the confluence of two or more of the terminal elements of the bronchial tree. They may be found subsequent to any condition that interferes with normal respiratory mechanism that produces increased intra-alveolar pressure. A single bulla is a rarity: they vary in size from that of a large vesicle to that of a large grape fruit. There are two views as to the formation of bullae: both believe bullae to be the result of the increased intra-alveolar pressure that is present. The distinction between bullae and blebs has been stressed. Bullae are by no means innocuous. There is no clinical sign or symptom characteristic of bullae. Diagnosis is nearly always made by means of x-rays and the differential points have been discussed. There is no known treatment of the condition.