This cast of the bronchial tree is formed of inspissated mucus and was coughed up by a patient during an asthmatic attack.

A microscopic view of bronchiectasis is presented.

A close view demonstrates the focal area of dilated bronchi with bronchiectasis.

The cut section of the hyperinflated lung of a patient dying in status asthmaticus appears essentially normal.

The mid lower portion of this photomicrograph demonstrates a dilated bronchus in which the mucosa and wall is not clearly seen because of the necrotizing inflammation with destruction.

This photomicrograph demonstrates a bronchus with increased numbers of chronic inflammatory cells in the submucosa.