| intersphincteric groove | |
|---|---|
| The interior of the anal canal and lower part of the rectum. (Line not shown but region is visible.) | |
| Latin | sulcus intersphinctericus |
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 to simple columnar epithelium in the anus.[3]
In live persons the color of the line is white, hence the name.
It is named for John Hilton.[4]
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