Bronchial asthma is a condition of the lungs which is characterized by

Bronchi are hyperreactive to a variety of stimuli to which the patient is exposed intermittently.

Bronchial lumen

Cytologic examination of sputum after an asthmatic attack shows

Characteristic histologic findings of bronchial wall which lead to narrowing of the bronchus include:

Autopsy: Biopsy is rarely done. In patients dying of status asthmatics the lungs are over-expanded and small airways are occluded by mucoid secretions. There is a variable amount of bronchiolar inflammation, including eosinophilic infiltrates. Mucus glands are hyperplastic with hyperplasia of bronchial and bronchiolar smooth muscle




Acute attack of dyspnea, prolonged coughing producing a large quantity of mucous, expiratory wheezing.