Biology:Intersphincteric groove

From HandWiki
intersphincteric groove
The interior of the anal canal and lower part of the rectum. (Line not shown but region is visible.)
Latinsulcus intersphinctericus
Anatomical terminology

Intersphincteric groove or Hilton's white line is a boundary in the anal canal.[1]

Below it, lymphatic drainage is to the superficial inguinal nodes.[2]

Hilton's white line is slightly below the pectinate line, a landmark for the intermuscular border between internal and external anal sphincter muscles.

This line represents the transition point from non-keratinized stratified squamous epithelium of the anal canal to keratinized stratified squamous epithelium of the anus and perianal skin.[3]

In live persons the color of the line is white, hence the name.

It is named for John Hilton.[4]

See also


  1. Ewing MR (July 1954). "The white line of Hilton". Proceedings of the Royal Society of Medicine 47 (7): 525–30. PMID 13185975. 
  2. "Pelvis". Retrieved 2007-12-09. 
  3. "The Digestive System". Retrieved 2009-01-14. 
  4. synd/3030 at Who Named It?