Cystic fibrosis in a 70 year old woman.

A 68 year old woman with a lifelong history of chronic bronchitis was diagnosed as having cystic fibrosis. The diagnosis was based on a suggestive family history, steatorrhoea, bronchiectasis with respiratory insufficiency, and very high sweat sodium content. The patient was found to be heterozygous for the delta F 508 gene defect.