Cystic fibrosis in adults [letter].

Long considered a childhood disease, cystic fibrosis has been recognized with increasing 
frequency in adults. In the case reported below the diagnosis was 
made in an adult. The initial diagnosis of cystic fibrosis in 
patients over 30 years of age has rarely been reported. Our 
patient, in whom the diagnosis of cystic fibrosis was first made 
at 48 years if age, serves to emphasize the point that 
physicians should consider cystic fibrosis in the differential diagnosis of adults 
with unexplained chronic obstructive lung disease. 