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Renal vein thrombosis and pulmonary embolism
Author(s)
Alice Chedid, MD
Mohamad Hanouneh, MD
C. John Sperati, MD, MHS

A 49-year-old man developed nephrotic-range proteinuria (urine protein–creatinine ratio 4.1 g/g), and primary membranous nephropathy was diagnosed by kidney biopsy. He declined therapy apart from angiotensin receptor blockade.

Five months after undergoing the biopsy, he presented to the emergency room with marked dyspnea, cough, and epigastric discomfort. His blood pressure was 160/100 mm Hg, heart rate 95 beats/minute, and oxygen saturation by pulse oximetry 97% at rest on ambient air, decreasing to 92% with ambulation.

Initial laboratory testing results were as follows:

  • Sodium 135 mmol/L (reference range 136–144)
  • Potassium 3.9 mmol/L (3.7–5.1)
  • Chloride 104 mmol/L (97–105)
  • Bicarbonate 21 mmol/L (22–30)
  • Blood urea nitrogen 14 mg/dL (9–24)
  • Serum creatinine 1.1 mg/dL (0.73–1.22)
  • Albumin 2.1 g/dL (3.4–4.9).

Urinalysis revealed the following:

  • 5 red blood cells per high-power field, compared with 1 to 2 previously
  • 3+ proteinuria
  • Urine protein–creatinine ratio 11 g/g
  • No glucosuria.

Electrocardiography revealed normal sinus rhythm without ischemic changes. Chest radiography did not show consolidation.

Figure 1. Coronal reformatted contrast-enhanced computed tomography showed a nearly occlusive low-attenuation filling defect within the left renal vein (arrow).
Figure 1. Coronal reformatted contrast-enhanced computed tomography showed a nearly occlusive low-attenuation filling defect within the left renal vein (arrow).
Computed tomography of the chest and abdomen with intravenous contrast demonstrated a nearly occlusive thrombus in the left renal vein (Figure 1) extending to the inferior vena cava with bilateral, nearly occlusive pulmonary emboli (Figure 2).

Figure 2. Coronal reformatted contrast-enhanced computed tomography of the chest showed bilateral low-attenuation filling defects in the pulmonary arteries (arrows).
Figure 2. Coronal reformatted contrast-enhanced computed tomography of the chest showed bilateral low-attenuation filling defects in the pulmonary arteries (arrows).
The patient was started on systemic anticoagulation with unfractionated heparin, which was then transitioned to warfarin therapy. Immunosuppressive therapy was also started, with rituximab 1,000 mg every other week for 2 doses, and 6 months of alternating monthly oral therapy with cyclophosphamide and methylprednisolone.

At 7 months after the thrombotic event, there was no evidence of residual renal vein thrombosis on magnetic resonance venography, and at 14 months his serum creatinine level was 0.9 mg/dL, albumin 4.0 g/dL, and urine protein–creatinine ratio 0.8 g/g.

RENAL VEIN THROMBOSIS: RISK FACTORS AND CLINICAL FEATURES

Severe hypoalbuminemia in the setting of nephrotic syndrome due to membranous neph­ropathy is associated with the highest risk of venous thromboembolic events, with renal vein thrombus being the classic complication.1 Venous thromboembolic events also occur in other nephrotic syndromes, albeit at a lower frequency.2

Venous thromboembolic events are estimated to occur in 7% to 33% of patients with membranous glomerulopathy, with albumin levels less than 2.8 g/dL considered a notable risk factor.1,2

While often a chronic complication, acute renal vein thrombosis may present with flank pain and hematuria.3 In our patient, the dramatic increase in proteinuria and possibly the increase in hematuria suggested renal vein thrombosis. Proximal tubular dysfunction, such as glucosuria, can be seen on occasion.

DIAGNOSIS AND TREATMENT

Screening asymptomatic patients for renal vein thrombosis is not recommended, and the decision to start prophylactic anticoagulation must be individualized.4

Although renal venography historically was the gold standard test to diagnose renal vein thrombosis, it has been replaced by noninvasive imaging such as computed tomography and magnetic resonance venography.

While anticoagulation remains the treatment of choice, catheter-directed thrombectomy or surgical thrombectomy can be considered for some patients with acute renal vein thrombosis.5

References
  1. Couser WG. Primary membranous nephropathy. Clin J Am Soc Nephrol 2017; 12(6):983–997. doi:10.2215/CJN.11761116
  2. Barbour SJ, Greenwald A, Djurdjev O, et al. Disease-specific risk of venous thromboembolic events is increased in idiopathic glomerulonephritis. Kidney Int 2012; 81(2):190–195. doi:10.1038/ki.2011.312
  3. Lionaki S, Derebail VK, Hogan SL, et al. Venous thromboembolism in patients with membranous nephropathy. Clin J Am Soc Nephrol 2012; 7(1):43–51. doi:10.2215/CJN.04250511
  4. Lee T, Biddle AK, Lionaki S, et al. Personalized prophylactic anticoagulation decision analysis in patients with membranous nephropathy. Kidney Int 2014; 85(6):1412–1420. doi:10.1038/ki.2013.476
  5. Jaar BG, Kim HS, Samaniego MD, Lund GB, Atta MG. Percutaneous mechanical thrombectomy: a new approach in the treatment of acute renal-vein thrombosis. Nephrol Dial Transplant 2002; 17(6):1122–1125. pmid:12032209
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Author and Disclosure Information

Alice Chedid, MD
Nephrology Fellow, Department of Medicine, Division of Nephrology, Johns Hopkins University, Baltimore, MD

Mohamad Hanouneh, MD
Instructor of Medicine, Department of Medicine, Division of Nephrology, Johns Hopkins University, Baltimore, MD

C. John Sperati, MD, MHS
Associate Professor of Medicine, Department of Medicine, Division of Nephrology, Johns Hopkins University, Baltimore, MD

Address: Mohamad Hanouneh, MD, Department of Medicine, Division of Nephrology, Johns Hopkins University, 1830 E Monument Street, Room 416, Baltimore, MD 21287; Mhanoun1@jhmi.edu

Issue
Cleveland Clinic Journal of Medicine - 85(11)
Publications
Cleveland Clinic Journal of Medicine
Topics
Vascular
Nephrology
Pulmonology
Imaging
Emergency Medicine
Cardiology
Page Number
833-834
Legacy Keywords
renal vein thrombosis, pulmonary embolism, PE, proteinuria, nephrosis, membranous nephropathy, computed tomography, hypoalbuminemia, Alice Chedid, Mohamad Hanouneh, C John Sperati
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The Clinical Picture
Author(s)
Alice Chedid, MD
Mohamad Hanouneh, MD
C. John Sperati, MD, MHS
Author(s)
Alice Chedid, MD
Mohamad Hanouneh, MD
C. John Sperati, MD, MHS
Author and Disclosure Information

Alice Chedid, MD
Nephrology Fellow, Department of Medicine, Division of Nephrology, Johns Hopkins University, Baltimore, MD

Mohamad Hanouneh, MD
Instructor of Medicine, Department of Medicine, Division of Nephrology, Johns Hopkins University, Baltimore, MD

C. John Sperati, MD, MHS
Associate Professor of Medicine, Department of Medicine, Division of Nephrology, Johns Hopkins University, Baltimore, MD

Address: Mohamad Hanouneh, MD, Department of Medicine, Division of Nephrology, Johns Hopkins University, 1830 E Monument Street, Room 416, Baltimore, MD 21287; Mhanoun1@jhmi.edu

Author and Disclosure Information

Alice Chedid, MD
Nephrology Fellow, Department of Medicine, Division of Nephrology, Johns Hopkins University, Baltimore, MD

Mohamad Hanouneh, MD
Instructor of Medicine, Department of Medicine, Division of Nephrology, Johns Hopkins University, Baltimore, MD

C. John Sperati, MD, MHS
Associate Professor of Medicine, Department of Medicine, Division of Nephrology, Johns Hopkins University, Baltimore, MD

Address: Mohamad Hanouneh, MD, Department of Medicine, Division of Nephrology, Johns Hopkins University, 1830 E Monument Street, Room 416, Baltimore, MD 21287; Mhanoun1@jhmi.edu

Article PDF
chedid_renalveinthrombosisandpulmonaryembolism.pdf
Article PDF
chedid_renalveinthrombosisandpulmonaryembolism.pdf
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A 49-year-old man developed nephrotic-range proteinuria (urine protein–creatinine ratio 4.1 g/g), and primary membranous nephropathy was diagnosed by kidney biopsy. He declined therapy apart from angiotensin receptor blockade.

Five months after undergoing the biopsy, he presented to the emergency room with marked dyspnea, cough, and epigastric discomfort. His blood pressure was 160/100 mm Hg, heart rate 95 beats/minute, and oxygen saturation by pulse oximetry 97% at rest on ambient air, decreasing to 92% with ambulation.

Initial laboratory testing results were as follows:

  • Sodium 135 mmol/L (reference range 136–144)
  • Potassium 3.9 mmol/L (3.7–5.1)
  • Chloride 104 mmol/L (97–105)
  • Bicarbonate 21 mmol/L (22–30)
  • Blood urea nitrogen 14 mg/dL (9–24)
  • Serum creatinine 1.1 mg/dL (0.73–1.22)
  • Albumin 2.1 g/dL (3.4–4.9).

Urinalysis revealed the following:

  • 5 red blood cells per high-power field, compared with 1 to 2 previously
  • 3+ proteinuria
  • Urine protein–creatinine ratio 11 g/g
  • No glucosuria.

Electrocardiography revealed normal sinus rhythm without ischemic changes. Chest radiography did not show consolidation.

Figure 1. Coronal reformatted contrast-enhanced computed tomography showed a nearly occlusive low-attenuation filling defect within the left renal vein (arrow).
Figure 1. Coronal reformatted contrast-enhanced computed tomography showed a nearly occlusive low-attenuation filling defect within the left renal vein (arrow).
Computed tomography of the chest and abdomen with intravenous contrast demonstrated a nearly occlusive thrombus in the left renal vein (Figure 1) extending to the inferior vena cava with bilateral, nearly occlusive pulmonary emboli (Figure 2).

Figure 2. Coronal reformatted contrast-enhanced computed tomography of the chest showed bilateral low-attenuation filling defects in the pulmonary arteries (arrows).
Figure 2. Coronal reformatted contrast-enhanced computed tomography of the chest showed bilateral low-attenuation filling defects in the pulmonary arteries (arrows).
The patient was started on systemic anticoagulation with unfractionated heparin, which was then transitioned to warfarin therapy. Immunosuppressive therapy was also started, with rituximab 1,000 mg every other week for 2 doses, and 6 months of alternating monthly oral therapy with cyclophosphamide and methylprednisolone.

At 7 months after the thrombotic event, there was no evidence of residual renal vein thrombosis on magnetic resonance venography, and at 14 months his serum creatinine level was 0.9 mg/dL, albumin 4.0 g/dL, and urine protein–creatinine ratio 0.8 g/g.

RENAL VEIN THROMBOSIS: RISK FACTORS AND CLINICAL FEATURES

Severe hypoalbuminemia in the setting of nephrotic syndrome due to membranous neph­ropathy is associated with the highest risk of venous thromboembolic events, with renal vein thrombus being the classic complication.1 Venous thromboembolic events also occur in other nephrotic syndromes, albeit at a lower frequency.2

Venous thromboembolic events are estimated to occur in 7% to 33% of patients with membranous glomerulopathy, with albumin levels less than 2.8 g/dL considered a notable risk factor.1,2

While often a chronic complication, acute renal vein thrombosis may present with flank pain and hematuria.3 In our patient, the dramatic increase in proteinuria and possibly the increase in hematuria suggested renal vein thrombosis. Proximal tubular dysfunction, such as glucosuria, can be seen on occasion.

DIAGNOSIS AND TREATMENT

Screening asymptomatic patients for renal vein thrombosis is not recommended, and the decision to start prophylactic anticoagulation must be individualized.4

Although renal venography historically was the gold standard test to diagnose renal vein thrombosis, it has been replaced by noninvasive imaging such as computed tomography and magnetic resonance venography.

While anticoagulation remains the treatment of choice, catheter-directed thrombectomy or surgical thrombectomy can be considered for some patients with acute renal vein thrombosis.5

A 49-year-old man developed nephrotic-range proteinuria (urine protein–creatinine ratio 4.1 g/g), and primary membranous nephropathy was diagnosed by kidney biopsy. He declined therapy apart from angiotensin receptor blockade.

Five months after undergoing the biopsy, he presented to the emergency room with marked dyspnea, cough, and epigastric discomfort. His blood pressure was 160/100 mm Hg, heart rate 95 beats/minute, and oxygen saturation by pulse oximetry 97% at rest on ambient air, decreasing to 92% with ambulation.

Initial laboratory testing results were as follows:

  • Sodium 135 mmol/L (reference range 136–144)
  • Potassium 3.9 mmol/L (3.7–5.1)
  • Chloride 104 mmol/L (97–105)
  • Bicarbonate 21 mmol/L (22–30)
  • Blood urea nitrogen 14 mg/dL (9–24)
  • Serum creatinine 1.1 mg/dL (0.73–1.22)
  • Albumin 2.1 g/dL (3.4–4.9).

Urinalysis revealed the following:

  • 5 red blood cells per high-power field, compared with 1 to 2 previously
  • 3+ proteinuria
  • Urine protein–creatinine ratio 11 g/g
  • No glucosuria.

Electrocardiography revealed normal sinus rhythm without ischemic changes. Chest radiography did not show consolidation.

Figure 1. Coronal reformatted contrast-enhanced computed tomography showed a nearly occlusive low-attenuation filling defect within the left renal vein (arrow).
Figure 1. Coronal reformatted contrast-enhanced computed tomography showed a nearly occlusive low-attenuation filling defect within the left renal vein (arrow).
Computed tomography of the chest and abdomen with intravenous contrast demonstrated a nearly occlusive thrombus in the left renal vein (Figure 1) extending to the inferior vena cava with bilateral, nearly occlusive pulmonary emboli (Figure 2).

Figure 2. Coronal reformatted contrast-enhanced computed tomography of the chest showed bilateral low-attenuation filling defects in the pulmonary arteries (arrows).
Figure 2. Coronal reformatted contrast-enhanced computed tomography of the chest showed bilateral low-attenuation filling defects in the pulmonary arteries (arrows).
The patient was started on systemic anticoagulation with unfractionated heparin, which was then transitioned to warfarin therapy. Immunosuppressive therapy was also started, with rituximab 1,000 mg every other week for 2 doses, and 6 months of alternating monthly oral therapy with cyclophosphamide and methylprednisolone.

At 7 months after the thrombotic event, there was no evidence of residual renal vein thrombosis on magnetic resonance venography, and at 14 months his serum creatinine level was 0.9 mg/dL, albumin 4.0 g/dL, and urine protein–creatinine ratio 0.8 g/g.

RENAL VEIN THROMBOSIS: RISK FACTORS AND CLINICAL FEATURES

Severe hypoalbuminemia in the setting of nephrotic syndrome due to membranous neph­ropathy is associated with the highest risk of venous thromboembolic events, with renal vein thrombus being the classic complication.1 Venous thromboembolic events also occur in other nephrotic syndromes, albeit at a lower frequency.2

Venous thromboembolic events are estimated to occur in 7% to 33% of patients with membranous glomerulopathy, with albumin levels less than 2.8 g/dL considered a notable risk factor.1,2

While often a chronic complication, acute renal vein thrombosis may present with flank pain and hematuria.3 In our patient, the dramatic increase in proteinuria and possibly the increase in hematuria suggested renal vein thrombosis. Proximal tubular dysfunction, such as glucosuria, can be seen on occasion.

DIAGNOSIS AND TREATMENT

Screening asymptomatic patients for renal vein thrombosis is not recommended, and the decision to start prophylactic anticoagulation must be individualized.4

Although renal venography historically was the gold standard test to diagnose renal vein thrombosis, it has been replaced by noninvasive imaging such as computed tomography and magnetic resonance venography.

While anticoagulation remains the treatment of choice, catheter-directed thrombectomy or surgical thrombectomy can be considered for some patients with acute renal vein thrombosis.5

References
  1. Couser WG. Primary membranous nephropathy. Clin J Am Soc Nephrol 2017; 12(6):983–997. doi:10.2215/CJN.11761116
  2. Barbour SJ, Greenwald A, Djurdjev O, et al. Disease-specific risk of venous thromboembolic events is increased in idiopathic glomerulonephritis. Kidney Int 2012; 81(2):190–195. doi:10.1038/ki.2011.312
  3. Lionaki S, Derebail VK, Hogan SL, et al. Venous thromboembolism in patients with membranous nephropathy. Clin J Am Soc Nephrol 2012; 7(1):43–51. doi:10.2215/CJN.04250511
  4. Lee T, Biddle AK, Lionaki S, et al. Personalized prophylactic anticoagulation decision analysis in patients with membranous nephropathy. Kidney Int 2014; 85(6):1412–1420. doi:10.1038/ki.2013.476
  5. Jaar BG, Kim HS, Samaniego MD, Lund GB, Atta MG. Percutaneous mechanical thrombectomy: a new approach in the treatment of acute renal-vein thrombosis. Nephrol Dial Transplant 2002; 17(6):1122–1125. pmid:12032209
References
  1. Couser WG. Primary membranous nephropathy. Clin J Am Soc Nephrol 2017; 12(6):983–997. doi:10.2215/CJN.11761116
  2. Barbour SJ, Greenwald A, Djurdjev O, et al. Disease-specific risk of venous thromboembolic events is increased in idiopathic glomerulonephritis. Kidney Int 2012; 81(2):190–195. doi:10.1038/ki.2011.312
  3. Lionaki S, Derebail VK, Hogan SL, et al. Venous thromboembolism in patients with membranous nephropathy. Clin J Am Soc Nephrol 2012; 7(1):43–51. doi:10.2215/CJN.04250511
  4. Lee T, Biddle AK, Lionaki S, et al. Personalized prophylactic anticoagulation decision analysis in patients with membranous nephropathy. Kidney Int 2014; 85(6):1412–1420. doi:10.1038/ki.2013.476
  5. Jaar BG, Kim HS, Samaniego MD, Lund GB, Atta MG. Percutaneous mechanical thrombectomy: a new approach in the treatment of acute renal-vein thrombosis. Nephrol Dial Transplant 2002; 17(6):1122–1125. pmid:12032209
Issue
Cleveland Clinic Journal of Medicine - 85(11)
Issue
Cleveland Clinic Journal of Medicine - 85(11)
Page Number
833-834
Page Number
833-834
Publications
Cleveland Clinic Journal of Medicine
Publications
Cleveland Clinic Journal of Medicine
Topics
Vascular
Nephrology
Pulmonology
Imaging
Emergency Medicine
Cardiology
Article Type
Article
Display Headline
Renal vein thrombosis and pulmonary embolism
Display Headline
Renal vein thrombosis and pulmonary embolism
Legacy Keywords
renal vein thrombosis, pulmonary embolism, PE, proteinuria, nephrosis, membranous nephropathy, computed tomography, hypoalbuminemia, Alice Chedid, Mohamad Hanouneh, C John Sperati
Legacy Keywords
renal vein thrombosis, pulmonary embolism, PE, proteinuria, nephrosis, membranous nephropathy, computed tomography, hypoalbuminemia, Alice Chedid, Mohamad Hanouneh, C John Sperati
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