<unk>  may be indicated for the following reasons: * Evaluation of rectal outlet obstruction (obstructed defecation) symptoms * Evaluation of all types of rectal (fecal) incontinence. * Suspected conditions such as internal rectal intussusception, enterocele, anismus, rectocele or sigmoidocele. * To compare pre- and post-surgical repair of rectal outlet obstruction (obstructed defecation). Specifically,<unk>  can differentiate between anterior and posterior rectocele. Also, in external rectal prolapse that was not directly visualized during examination, this radiographic projection will demonstrate its presence.
Defecography
Enteroscopy
GI cocktail
Capsule endoscopy
Sialoendoscopy
Fecal pH test
EGS 
Stool test