38-year-old man was referred to our University Hospital for
evaluation of chronic cough with sputum production. During the last 15
years, he had experienced an increased expectoration of mucoid sputum
that became purulent during infectious exacerbations, sometimes with
bloody sputum. He denied fever, wheezes, chest pain, dyspnea, or weight
loss. No other respiratory illness was present. His parents and
siblings were normal. He works as a security officer. He has never
smoked and denies regular alcohol intake.