Idiopathic bile acid diarrhoea reconsidered.

Two new cases of a rare entity provisionally coined 'idiopathic bile acid diarrhoea' are reported and compared with previous cases. The diarrhoeal syndrome has been identified as a cholegenic enteropathy. In the absence of conventional ileopathy the cause of the bile acid loss is obscure, but it is hypothesized that it may be due to a relative deficiency in ileal absorptive sites for bile acid anions. So far the diagnosis has partly been based on measurements of faecal bile acid losses. It is suggested that a carefully conducted therapeutic trial with cholestyramine may be almost equally helpful.