Space
Perinephric space and renal coverings
The renal fascial compartment and its internal planes
High-yield
The capsule, perirenal fat and renal fascia are distinct layers. Renal fascia is not simply an open-ended bag: inferior fusion and interlaminar pathways influence possible spread.
Overview
The perinephric region encloses the kidney and surrounding fat within anterior and posterior renal fascia. Bridging septa connect the fascial layers and organ surfaces. The adrenal gland occupies a related but partly separated compartment, and the proximal ureter and hilar vessels pass through the region.
Reference facts
- Boundaries
- Bounded principally by anterior and posterior renal fascial layers, with lateral continuity into lateroconal fascia. The fibrous capsule covers the kidney within this larger compartment.
- Contents
- Kidney, perirenal fat and septa, hilar vessels and proximal ureter, with the adrenal region partly separated by an intervening fascial partition.
- Communications
- Fascial layers merge and blend with neighboring retroperitoneal tissues. Disease may extend through bridging septa and potential interlaminar planes; pelvic extension is not an unrestricted normal opening.
Clinical correlation
Hemorrhage, urine or infection may collect around the kidney and extend through septal or interfascial routes. Cadaver and CT studies show that direct free descent into the pelvis is constrained, despite the traditional description of an open inferior fascial cone.
Frequently asked questions
What are the boundaries of the perinephric space and renal coverings?
Bounded principally by anterior and posterior renal fascial layers, with lateral continuity into lateroconal fascia. The fibrous capsule covers the kidney within this larger compartment.
What do the perinephric space and renal coverings contain?
Kidney, perirenal fat and septa, hilar vessels and proximal ureter, with the adrenal region partly separated by an intervening fascial partition.
What do the perinephric space and renal coverings communicate with?
Fascial layers merge and blend with neighboring retroperitoneal tissues. Disease may extend through bridging septa and potential interlaminar planes; pelvic extension is not an unrestricted normal opening.