Diagnostic Ultrasound - Abdomen and Pelvis

Cervix
GRAPHICS OF CERVIX ANATOMY
Anatomy: Pelvis
Endometrial canal
Internal os
Endocervix
Endocervical canal
Posterior fornix of vagina
Vesicouterine pouch
Ectocervix
External os
Anterior fornix of vagina
Vaginal canal
Bladder
Prevesical space (space of
Retzius)
Paravesical space
Vesicocervical/vesicovaginal
space
Cardinal ligament
Rectovaginal space
Pararectal space
Uterosacral ligament
Presacral space
(Top) Median sagittal graphic shows the cervix, which begins at the isthmus, the inferior narrowing portion of the uterus. It has a
supravaginal portion (endocervix) and a vaginal portion (ectocervix), which divides the vagina into shallow anterior fornix, deep
posterior, and lateral fornices. (Bottom) Graphic shows the female pelvic ligaments and spaces at the cervical/vaginal junction. The
ligaments are visceral ligaments, which are composed of specialized endopelvic fascia and contain vessels, nerves, and lymphatics.
Some of the main supporting ligaments for the uterus are attached to the cervix, which are cardinal and uterosacral ligaments. The
spaces are largely filled with loose connective tissue and are used as dissection planes during surgery.
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