Wikipedia
Dolichodouglas
A Dolichodouglas (word derived from ancient Greek Δόλιχος (dolichos), the long distance in running and the Douglas' pouch) is the medical term describing an abnormally profound Douglas' pouch (recto-uterine pouch). It may be congenital or acquired. The increased depth of the Douglas' pouch brings it in close anatomical contact with the posterior vaginal wall. Therefore intestinal loops may apply pressure to this wall, causing a condition known as enterocele, which presents as an outpouching on the posterior vaginal wall. This can be felt and seen during pelvic exam.
[1]JTA 2001 : Elytrocele