A Case of Hypokalemia Caused by Left Native Renal Artery Stenosis in a Kidney Transplant Recipient
© 2023 S. Karger AG, Basel..
A 39-year-old woman with end-stage renal failure of unknown origin was on peritoneal dialysis for 10 years. One year ago, she underwent ABO-incompatible living-donor kidney transplantation from her husband. After the kidney transplantation, her serum creatinine level remained around 0.7 mg/dL, but her serum potassium level remained low at around 3.5 mEq/L despite potassium supplementation and spironolactone. The patient's plasma renin activity (PRA) and plasma aldosterone concentration (PAC) were markedly elevated (20 ng/mL/h and 868 pg/mL, respectively). A CT angiogram of the abdomen performed 1 year previously suggested stenosis of the left native renal artery, which was considered responsible for the hypokalemia. Renal venous sampling was done on both the native kidneys and the transplanted kidney. Since renin secretion from the left native kidney was significantly elevated, a laparoscopic left nephrectomy was performed. Postoperatively, the renin-angiotensin-aldosterone system was markedly improved (PRA: 6.4 ng/mL/h, PAC: 147.3 pg/mL), and the serum potassium levels also improved. Pathological examination of the removed kidney showed many atubular glomeruli and hyperplasia of the juxtaglomerular apparatus (JGA) in residual glomeruli. In addition, renin staining showed strong positivity in the JGA of these glomeruli. Here, we report a case of hypokalemia caused by left native renal artery stenosis in a kidney transplant recipient. This valuable case study provides histological confirmation of maintained renin secretion in an abandoned native kidney after kidney transplantation.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:147 Suppl 1 |
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| Enthalten in: |
Nephron - 147 Suppl 1(2023) vom: 28., Seite 46-52 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Shiina, Yuki [VerfasserIn] |
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| Links: |
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| Themen: |
4964P6T9RB |
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| Anmerkungen: |
Date Completed 15.11.2023 Date Revised 30.04.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1159/000530229 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM354460404 |
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| 520 | |a A 39-year-old woman with end-stage renal failure of unknown origin was on peritoneal dialysis for 10 years. One year ago, she underwent ABO-incompatible living-donor kidney transplantation from her husband. After the kidney transplantation, her serum creatinine level remained around 0.7 mg/dL, but her serum potassium level remained low at around 3.5 mEq/L despite potassium supplementation and spironolactone. The patient's plasma renin activity (PRA) and plasma aldosterone concentration (PAC) were markedly elevated (20 ng/mL/h and 868 pg/mL, respectively). A CT angiogram of the abdomen performed 1 year previously suggested stenosis of the left native renal artery, which was considered responsible for the hypokalemia. Renal venous sampling was done on both the native kidneys and the transplanted kidney. Since renin secretion from the left native kidney was significantly elevated, a laparoscopic left nephrectomy was performed. Postoperatively, the renin-angiotensin-aldosterone system was markedly improved (PRA: 6.4 ng/mL/h, PAC: 147.3 pg/mL), and the serum potassium levels also improved. Pathological examination of the removed kidney showed many atubular glomeruli and hyperplasia of the juxtaglomerular apparatus (JGA) in residual glomeruli. In addition, renin staining showed strong positivity in the JGA of these glomeruli. Here, we report a case of hypokalemia caused by left native renal artery stenosis in a kidney transplant recipient. This valuable case study provides histological confirmation of maintained renin secretion in an abandoned native kidney after kidney transplantation | ||
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