The results of exfoliative cytology studies in 50 patients with symptoms of large bowel disorder.

The results of exfoliative cytology studies in 50 patients with symptoms of large bowel disorder are analysed. Certain cases are described in detail. Of 23 patients with cancer, a positive cytological result was obtained in nineteen. One false positive result was recorded.Suggestions are made as to the usefulness of this investigative technique, and mention is made of the increased degree of accuracy obtained when a membrane filter is used to concentrate the cellular deposit.