
Fig. 1. Retroperitoneal and interfascial planes. Drawing at level of renal
hila shows that renal and lateroconal fasciae are laminated planes composed of
apposed layers of embryonic mesentery. Thickness of interfascial planes is
exaggerated to illustrate their potentially expansile nature. Note that
perinephric spaces (PRS) are closed medially. Retromesenteric space is
continuous across midline. Retromesenteric anterior interfascial space (RMP),
retrorenal posterior interfascial space (RRS), and lateroconal plane
communicate at fascial trifurcation (arrows). A = aorta, APS =
anterior pararenal space, ARF = anterior renal fascia, DPS = dorsal pleural
sinus, IVC = inferior vena cava, LCF = lateroconal fascia, PP = parietal
peritoneum, PPS = posterior pararenal space, PRF = posterior renal fascia, TF
= transversalis fascia, asterisk = posterior peritoneal recess.
(Reprinted from [3])