Perirenal lucency ("kidney sweat"): a new sign of renal failure.

Yassa, Nabil A.; Peng, Ming; Ralls, Philip W.

doi:10.2214/ajr.173.4.10511182

Cited by 26 publications

(9 citation statements)

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“…In humans bilateral perirenal fluid has been recognized as an additional sonographic feature of renal failure caused by systemic hypertension, glomerulonephritis, acute tubular necrosis, and sepsis. 10 This sonographic finding was identified in 14% of patients with renal dysfunction over a 1 year period. A similar sonographic finding of perirenal fluid in renal failure has been recognized in the goat in nephrotoxicity caused by Narthecium ossifragum, 11 a perennial herb of the lily family, and in ethylene glycol toxicity and leptospirosis in the dog but it has not been reported in more recently described nephrotoxicoses caused by several lily species in the cat 12 or raisins and grapes in the dog 13 or with other causes of acute renal failure.…”

Section: Introductionmentioning

confidence: 92%

Perirenal Effusion in Dogs and Cats With Acute Renal Failure

Holloway

O’Brien

2007

Vet Radiology Ultrasound

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Perirenal fluid accumulation has been described as an ultrasonographic feature of urine leakage, hemorrhage, abscessation, or neoplasia. The purpose of this retrospective study was to report perirenal effusion as an additional ultrasonographic finding in canine and feline patients with acute renal failure. The causes of acute renal failure in 18 patients included nephrotoxicity (4), leptospirosis (3), ureteral obstruction (2), renal lymphoma (2), ureteronephrolithiasis (2), prostatic urethral obstruction (1) and interstitial nephritis and ureteritis (1). An underlying cause was not identified in three patients. The sonographic finding of perirenal fluid was bilateral in 15 patients. Unilateral perirenal fluid was identified ipsilateral to the site of ureteric obstruction in two patients. Large effusions extended into the caudal retroperitoneal space. Additional sonographic findings suggestive of renal parenchymal disease included mild (5), moderate (5) or severe (2) pyelectasia, increased renal echogenicity (11), increased (9) or decreased renal size (2) and ureteral and/or renal calculi (3). There did not appear to be an association between the volume of perirenal fluid and the severity of renal dysfunction. All patients with large effusions underwent euthanasia. Perirenal fluid developing in acute renal failure is thought to be an ultrafiltrate associated with tubular back-leak into the renal interstitium that overwhelms lymphatic drainage within the perirenal and retroperitoneal connective tissues although obstruction to urine flow may also play a role. Localized perirenal retroperitoneal free fluid may be a useful ultrasonographic feature to assist with the characterization of, and determination of prognosis in, patients with suspected renal disease.

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Section: Introductionmentioning

confidence: 92%

Perirenal Effusion in Dogs and Cats With Acute Renal Failure

Holloway

O’Brien

2007

Vet Radiology Ultrasound

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“…The most common¯uid accumulations are blood, pus and urine, depending on the causative renal or retroperitoneal disease process [2]. Perirenal¯uid secondary to renal parenchymal disease was recently described by Yassa et al [1], and a case report by Oro®no et al [3] described the presence of unilateral perirenal¯uid collection in a patient with membranous nephropathy, nephrotic syndrome and ipsilateral renal vein thrombosis. The authors attributed the development of unilateral perirenal uid collection to`the less direct drainage of the ureteral and capsular veins into the vena cava secondary to renal vein thrombosis, an increase in the intravascular hydrostatic capillary pressure within an exuberant collateral circulation and the decreased oncotic pressure which could have led tō uid extravasation resulting in transudate accumulation in the subcapsular space' [3].…”

Section: Discussionmentioning

confidence: 99%

“…At renal sonography (US), the presence of a perirenal hypoechoic rim (the`kidney sweat' sign) was ®rst described by Yassa et al [1] as a new sonographic ®nding in renal parenchymal disease and renal failure. We describe similar ®ndings in nine patients with renal parenchymal disease with or without renal failure, and elaborate further on the clinical, radiological, pathological and biochemical analysis of the perirenal¯uid.…”

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confidence: 99%

Perirenal Fluid in Renal Parenchymal Medical Disease (‘Floating Kidney’): Clinical Significance and Sonographic Grading

Haddad¹,

Medawar²,

Hawary³

et al. 2001

Clinical Radiology

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“…Although the perinephric fluid is almost always bilateral, the lack of septations and compartmentalization of the fluid allow differentiation from lymphangiomatosis. Non-loculation of the fluid, formation of obtuse angles between the fluid and kidney, and lack of distortion of the renal contour differentiate it from a subcapsular fluid collection [20]. Additionally, compression of the perinephric fat and displacement, rather than inclusion, of the adrenal glands confirm that the fluid is subcapsular [21] (Fig.…”

Section: Simple Fluidmentioning

confidence: 96%

Acute conditions affecting the perinephric space: imaging anatomy, pathways of disease spread, and differential diagnosis

et al. 2012

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The perinephric space is an important, central compartment of the retroperitoneum which may host various acute conditions. Imaging evaluation of the perinephric space requires an understanding of its anatomy and the pathways of disease spread to and from other retroperitoneal compartments. Numerous acute conditions can affect the perinephric space and may occur in isolation, extend from nearby retroperitoneal structures, or be part of a systemic condition. Familiarity with the key imaging findings of acute conditions affecting the perinephric space is imperative to facilitate diagnosis and guide treatment. The purpose of this article is to review and illustrate the relevant anatomy, pathways of disease spread, and acute pathology encountered during cross-sectional imaging evaluation of the perinephric space.

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Perirenal lucency ("kidney sweat"): a new sign of renal failure.

Cited by 26 publications

References 0 publications

Perirenal Effusion in Dogs and Cats With Acute Renal Failure

Perirenal Effusion in Dogs and Cats With Acute Renal Failure

Perirenal Fluid in Renal Parenchymal Medical Disease (‘Floating Kidney’): Clinical Significance and Sonographic Grading

Acute conditions affecting the perinephric space: imaging anatomy, pathways of disease spread, and differential diagnosis

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