<unk>  (from the Greek term for letter "s/ς" + "eidos" + "scopy": namely, to look inside an "s"/"ς"-like object) is the minimally invasive medical examination of the large intestine from the rectum through the nearest part of the colon, the<unk> moid colon. There are two types of<unk> : flexible<unk> , which uses a flexible endoscope, and rigid<unk> , which uses a rigid device. Flexible<unk>  is generally the preferred procedure. A<unk>  is similar to, but not the same as, a colonoscopy. A<unk>  only examines up to the<unk> moid, the most distal part of the colon, while colonoscopy examines the whole large bowel.
Sigmoidoscopy
Stool test
Dry enema
EGS 
Defecography
Rectal examination
Lower gastrointestinal series
Magnetic resonance enterography