Anocutaneous line
Anatomic feature in the anal canal
From Wikipedia, the free encyclopedia
The anocutaneous line, also called the Hilton white line or intersphincteric groove, is a boundary in the anal canal.[1]
| Anocutaneous line | |
|---|---|
The interior of the anal canal and lower part of the rectum. (Line not shown but region is visible.) | |
| Details | |
| System | Alimentary system |
| Identifiers | |
| Latin | linea anocutanea |
| TA98 | A05.7.05.012 |
| TA2 | 3019 |
| FMA | 15715 |
| Anatomical terminology | |
Below the anocutaneous line, lymphatic drainage is to the superficial inguinal nodes.[2]
The anocutaneous line is slightly below the pectinate line and a landmark for the intermuscular border between internal and external anal sphincter muscles.
The anocutaneous 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 alternative name. It is named for John Hilton.[4]
