Bronchial carcinoid presenting as refractory asthma.

Bronchial carcinoids are low-grade malignant neoplasms that usually occur in the central airways. The central endobronchial location typically results in symptoms of bronchial obstruction. Infrequently, asthma-like symptoms may be produced by endobronchial tumors. The diagnosis of bronchial carcinoid is often made after months of unsuccessful treatment for more common respiratory conditions.