Anorectal motility abnormalities in children with encopresis and chronic constipation.

Objective: To evaluate the response to rectal distension in children with chronic constipation and children with chronic constipation and encopresis.

Study Design: We studied 27 children, aged 3 to 16 years, with chronic constipation; 12 had encopresis. Anorectal motility was measured with a solid state catheter.