Alteration of Perirenal Fat Secondary to Diffuse Retroperitoneal Infiltration

Fritzsche, Peggy J.; Toomey, Frances B.; Ta, Han

doi:10.1148/131.1.27

Cited by 3 publications

(2 citation statements)

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“…The integrity of the renal structure and its surrounding tissues is essential for multiple functions, such as forming an effective filtration barrier, maintaining fluid and ion homeostasis ( 12 – 14 ). A variety of diseases are marked by the involvement of the renal structure and its surrounding tissues ( 6 , 15 – 17 ). McCort et al reported a sign of the infiltration of perirenal fat by hemorrhage on abdominal CT imaging during renal parenchyma laceration ( 16 ).…”

Section: Discussionmentioning

confidence: 99%

“…McCort et al reported a sign of the infiltration of perirenal fat by hemorrhage on abdominal CT imaging during renal parenchyma laceration ( 16 ). Fritzsche et al ( 17 ) reported six cases, such as inflammatory diseases or different tumors, in which perirenal fat was infiltrated by inflammatory fluid and tumor when violated. Anatomically, the renal capsule refers to a thin membranous sheath covering the external surface of the kidney ( 18 ), surrounded by perirenal adipose tissue.…”

Section: Discussionmentioning

confidence: 99%

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The Involvement of Renal Capsule Is Associated With Acute Kidney Injury in Patients With Acute Pancreatitis

et al. 2021

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Background: Acute pancreatitis (AP) is characterized by pancreatic/peripancreatic inflammation. Involvement of renal capsule refers to peripancreatic inflammation extending beyond the Gerota fascia and disappearance of renal rim sign (+) on CT images. However, its association with acute kidney injury (AKI), an important complication of AP, was rarely studied.Aim: This study aimed to assess the relationship between the involvement of renal capsule and AKI in a cohort of patients with AP.Methods: We retrospectively screened all the patients admitted for AP from January 2018 to December 2019. The involvement of renal capsule was judged by experienced radiologists according to the CT imaging. Propensity score matching (PSM) was used to control for biases in group sizes and baseline characteristics. The primary outcome was the development of AKI during the index admission. We also categorized the pararenal inflammation with the renal rim grade (RRG) and compared the incidence of AKI among different grades.Results: Involvement of renal capsule was identified in 71 of 503 patients (14.1%). The incidence of AKI was significantly higher in these patients when compared with the matched controls (43/71, 60.6% vs. 12/71, 16.9%, p < 0.001). Moreover, mortality also differed between groups (12.7% vs. 1.4%, p = 0.017). Multivariable logistic regression showed that renal capsule involvement is an independent risk factor of AKI (odds ratio, 4.355; 95% confidence interval, 1.434, 13.230, p = 0.009). Patients with RRG grade III had a significantly higher incidence of AKI than the other two grades (60.6% for Grade III, 17.1% for Grade II, and 3.8% for Grade I, p < 0.001).Conclusion: Involvement of renal capsule is associated with higher AKI incidence and mortality.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The Involvement of Renal Capsule Is Associated With Acute Kidney Injury in Patients With Acute Pancreatitis

et al. 2021

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Inflammatory Renal Disease

Goldman

1991

Radiology of the Upper Urinary Tract

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The renal rind sign: a new ultrasound indication of inflammatory disease in the abdomen

Belli¹,

Joseph²

1988

The British Journal of Radiology

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The width of the right anterior extrarenal tissue is increased on ultrasound examination in patients with abdominal inflammatory disease. Thickened perirenal fascia associated with acute pancreatitis has previously been reported on computed tomography. A case report has described increased echogenicity of the pararenal space on ultrasound in children with pancreatitis but increased width of the space between the liver and the renal capsule has not hitherto been described in association with inflammatory disease in the abdomen in adults. We have observed it in acute cholecystitis, acute pancreatitis, acute appendicitis, a perforated duodenal ulcer, a leaking anastomosis with a right subphrenic abscess following total gastrectomy and in a patient with septicaemia and liver abscesses. Normal values were obtained in 100 patients without detectable or known disease and were found to be between 1 and 6 mm (mean 2.5 mm) in men and 1 and 5 mm (mean 1.8 mm) in women. The patients with abdominal disease who demonstrated this sign had values ranging from 9-11 mm (mean 10 mm).

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Alteration of Perirenal Fat Secondary to Diffuse Retroperitoneal Infiltration

Cited by 3 publications

References 0 publications

The Involvement of Renal Capsule Is Associated With Acute Kidney Injury in Patients With Acute Pancreatitis

The Involvement of Renal Capsule Is Associated With Acute Kidney Injury in Patients With Acute Pancreatitis

Inflammatory Renal Disease

The renal rind sign: a new ultrasound indication of inflammatory disease in the abdomen

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