noun
sigmoid colon
Anatomical term for the S-shaped part of the large intestine. Also written as Ｓ状結腸.
See also: Ｓ状結腸
大腸内視鏡検査では、Ｓ字結腸まで観察します。
In a colonoscopy, we observe up to the sigmoid colon.
Synonymous; Ｓ状結腸 is a more common variant with the same meaning.
From the shape of the colon resembling the letter 'S' (Ｓ字) plus 結腸 (colon).