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  Table of Contents  
Year : 2020  |  Volume : 30  |  Issue : 5  |  Page : 346-347

Bilateral perinephric collections in nephrotic syndrome

1 Department of Nephrology, Jawaharlal Institute of Post Graduate Medical Education and Research, Puducherry, India
2 Department of Urology, Jawaharlal Institute of Post Graduate Medical Education and Research, Puducherry, India

Date of Submission18-Nov-2019
Date of Acceptance03-Apr-2020
Date of Web Publication28-Aug-2020

Correspondence Address:
Dr. P S Priyamvada
Department of Nephrology, Jawaharlal Institute of Post Graduate Medical Education and Research, Puducherry - 605 006
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijn.IJN_375_19

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How to cite this article:
Kumar M N, Priyamvada P S, Ganga R G, Harsha BS, Parameswaran S. Bilateral perinephric collections in nephrotic syndrome. Indian J Nephrol 2020;30:346-7

How to cite this URL:
Kumar M N, Priyamvada P S, Ganga R G, Harsha BS, Parameswaran S. Bilateral perinephric collections in nephrotic syndrome. Indian J Nephrol [serial online] 2020 [cited 2020 Oct 30];30:346-7. Available from:

A 21-year-old lady, with history of childhood nephrotic syndrome was referred with a relapse. Ultrasound abdomen and non-contrast computed tomography (NCCT) showed bilateral massive renal subcapsular collections [Figure 1] and [Figure 2]. Duplex imaging confirmed normal flow across the renal vessels. A lymphangioscintigraphy showed normal lymphatic flow. A technetium 99 labelled L, L-ethylenedicysteine (LLEC) scan showed normal parenchymal function and non-obstructed drainage in both kidneys. An ultrasound-guided aspiration of the perinephric fluid revealed a transudate (no cells, protein 0.7 gm/dL; albumin 0.2 gm/dL). Since the patient had a history of steroid-responsive nephrotic syndrome, she was restarted on prednisolone 1 mg/kg/day, assuming that remission of nephrotic state would lead to the resorption of the perirenal fluid collections. A repeat ultrasound was done after one and a half months of attaining a complete remission. It showed persistent fluid collections, with similar dimensions prior to the start of steroid therapy. Hence, a laparoscopic fenestration of Gerota's fascia was performed on the left side, along with a kidney biopsy. The renal capsule was considerably thicker and had a fibrous texture. Biopsy from the renal capsule showed fibro-adipose and fibro collagenous tissue admixed with plasma cells and lymphocytes. We did not drain the right side, assuming that it might resolve in due course. The kidney biopsy was suggestive of Focal Segmental Glomerulosclerosis––not otherwise specified. We reassessed the patient at the end of three months, which showed persistent perinephric collections on the right side. A fenestration procedure was done on the right side as well. Her steroids were stopped after 4 months. She continues to be in remission, with no recurrence of subcapsular fluid collection.
Figure 1: Ultrasound abdomen of left kidney showing subcapsular fluid collections

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Figure 2: Plain CT abdomen showing massive perinephric collections

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Renal subcapsular fluid collections are due to the accumulation of blood, pus, or urine postoperatively. Subcapsular transudate collections were reported in about 14% of cases with chronic kidney disease.[1] There are only a few reports of subcapsular fluid collections in patients with Nephrotic syndrome. The exact pathophysiology is not known. The renal subcapsular fluid collections have been reported in membranoproliferative glomerulonephritis, focal segmental glomerulosclerosis, lupus nephritis, amyloidosis, and in membranous nephropathy with renal vein thrombosis.[2],[3],[4],[5] The potential pathophysiologic mechanisms include renal vein thrombosis, leading to increased hydrostatic pressure. In the presence of significant hypoalbuminemia associated with the nephrotic syndrome, this would lead to extravasation of fluid into the subcapsular spaces. An alternative hypothesis proposed is excessive sodium retention leading to the formation of sub-capsular fluid collections.[1],[2] There are case reports of successful management through percutaneous pigtail catheter drainage[3] or fenestration of Gerota's fascia.[4] There are reports of continuous fluid drainage from the percutaneous drain, requiring the instillation of povidone-iodine.[5] There are no recurrences reported after the fenestration of Gerota's fascia. With a background history of prolonged nephrotic state, considering the possibility that the drain might never become dry, we have opted for laparoscopic fenestration and drainage of fluid into the peritoneal cavity.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient has given her consent for her images and other clinical information to be reported in the journal. The patient understands that her name and initials will not be published and due efforts will be made to conceal her identity, but anonymity cannot be guaranteed.

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Conflicts of interest

There are no conflicts of interest.

  References Top

Yassa NA, Peng M, Ralls PW. Perirenal lucency (“kidney sweat”): A new sign of renal failure. Am J Roentgenol 1999;173:1075-7.  Back to cited text no. 1
Haddad MC, Medawar WA, Hawary MM, Khoury NJ, Ammouri NF, Shabb NS. Perirenal fluid in renal parenchymal medical disease ('floating kidney'): Clinical significance and sonographic grading. Clin Radiol 2001;56:979-83.  Back to cited text no. 2
Mukherjee D, Sharma S, Mahapatra D, Nair RK, Datt B, Arora D. A rare presentation of nephrotic syndrome. CEN Case Rep 2017;6:161-3.  Back to cited text no. 3
Koppelstaetter C, Peschel R, Glodny B, Riegler P, Passler W, Lhotta K. Fenestration of the Gerota's fascia as symptomatic treatment of floating kidneys. Am J Kidney Dis 2007;50:1020-2.  Back to cited text no. 4
Orofino L, Herrero JA, Quereda C, del Amo P, Gonzalo A, Marcen R, et al. Perirenal subcapsular fluid collection in a patient with membranous nephropathy and renal vein thrombosis. J Urol 1986;136:1287-9.  Back to cited text no. 5


  [Figure 1], [Figure 2]


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