For the assessment of ileoanal and coloanal pouches different diagnost
ic tests should be applied. Apart from case history and rectal digital
examination the most important methods comprise a radiologic evaluati
on of the pouch and its afferent loop as well as anorectal manometry f
or the assessment of pouch motility and sphincter function. Increasing
ly transanal endosonography is being used for the precise examination
of size, volume, and shape of ileoanal and coloanal pouches. The affer
ent loop is also easily accessible to endosonography, e.g. for evaluat
ion of bowel wall morphology and function. Furthermore, in cases of co
loanal pouches following an oncologic lower anterior resection, endoso
nography is used in follow-up examinations for the detection of local
tumor recurrence.