The Silicone Foam Enema as a Source of Cytological Specimens From the Left Colon

Silicone foam enema examination of the left colon has been used in 70 cases to provide material for cytologlcal study. Smears taken directly from suspicious areas have given satisfactory cytologlcal specimens in most cases. Cytologlcal reports have been sufficiently accurate to make these a very helpful adjunct to macroscopic assessment of the cast. After combined macroscopic and microscopic assessment, no missed case of carcinoma has been detected during periods of up to three and a half years. However, further follow-up will be required to give a definitive assessment.