The potential space between Gerota's (renal) fascia and the overlying posterior peritoneum forms a bursa-like retroperitoneal compartment enclosing the kidney and perirenal fat, maintaining the kidney in its retroperitoneal position.
Gerota's fascia space is relevant in perinephric abscess, haematoma, and urinoma formation. Infection tracks within this space producing perirenal collection visible on CT as stranding and fluid within the renal fascia compartment. Renal transplant wound complications and post-nephrectomy lymphocele also develop in this retroperitoneal fascial space. CT-guided drainage targets the Gerota fascia compartment.
Infection within Gerota's fascial compartment from ascending UTI, pyelonephritis, or haematogenous seeding producing flank pain, fever, and a retroperitoneal fluid collection managed by CT-guided drainage and antibiotics.
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