extraperitoneal fascia

ex·tra·per·i·to·ne·al fas·ci·a

[TA]
fascial plane of mainly loose areolar tissue between the parietal peritoneum and the internal muscular (iliopsoas and inner lamina of thoracolumbar fascia) and transversalis fascia of the body wall; its quality and quantity vary considerably, being very thick and fatty posteriorly, as pararenal fascia around the kidneys, but thin and fibrous anteriorly, deep to the linea alba of the anterior abdominal wall.

ex·tra·per·i·to·ne·al fas·ci·a

(eks'tră-per'i-tŏ-nē'ăl fash'ē-ă) [TA]
The thin layer of fascia and adipose tissue between the peritoneum and fascia transversalis.
Synonym(s): fascia subperitonealis [TA] .