Intersphincteric groove

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

intersphincteric groove
The interior of the anal canal and lower part of the rectum. (Line not shown but region is visible.)
Details
Identifiers
Latinsulcus intersphinctericus
TAA05.7.05.012
FMA15715
Anatomical terminology

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
  • Hilton's Law

References
  1. Ewing MR (July 1954). "The white line of Hilton". Proceedings of the Royal Society of Medicine. 47 (7): 525–30. PMC 1918929. PMID 13185975.
  2. "Pelvis". Retrieved 2007-12-09.
  3. "The Digestive System". Retrieved 2009-01-14.
  4. synd/3030 at Who Named It?


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