Bronchilar carcinoma in a 20-year-old man

A 20-year-old man with a nine-month history of pulmonary abscess and hemoptysis was discovered to have a small nidus of bronchiolar carcinoma in the fibrotic reaction surrounding the pulmonary abscess. The cell type, origin, and occurrence of this tumor in fibrotic pulmonary disease are discussed. We believe that this case represents an unusual presentation of bronchiolar carcinoma with respect to clinical manifestation, tumor size, and patient's age.