Renal vein thrombosis
Updates to Article Attributes
Renal vein thrombosis (RVT) can be either from "bland" thrombus or tumour thrombus (extension of tumor into the vein). There are numerous aetiologies for bland thrombus, but it most most commonly occurs in the hypercoagulablenephrotic syndrome. Renal vein thrombus is commoner on the left side, presumably due to the left renal vein being considerably longer than the right.
Pathophysiology
-
in children (it is the commonest vascular condition in the neonatal kidney.1)
- dehydration and sepsis are common underlying factors for renal vein thrombosis
- sickle cell disease2
- polycythaemia
- maternal diabetes
- indwelling umbilical venous catheters
-
in adults: renal vein thrombosis can result from a variety of disorders, including
- nephrotic syndrome
- systemic lupus erythematosus
- amyloidosis
- glomerulonephritis
- collagen vascular disease
- diabetes
- renal sepsis (thrombophlebitis)
- tumour thrombus, e.g.
- renal cell carcinoma
- lymphoma
45 - in rare cases, adrenal carcinoma
- trauma is another potential cause of renal vein thrombosis.
Complications include pulmonary embolism, renal atrophy, and papillary necrosis. Bland thrombus can coexist with tumour thrombus.
Radiographic features
Ultrasound
Grayscale ultrasound findings include
- renal enlargement with hypoechoic cortex from edema (early phase)
- decreasing size and increased echogenicity (late)
- Doppler findings include reversal of arterial diastolic flow, absent venous flow, visualization of thrombus within the lumen, high resistance in the renal artery with elevated resistive index
CT
As with venous thrombosis elsewhere, the thrombosis is observed as a filling defect during venous phase imaging following intravenous contrast. Changes in the attenuation, either focal or diffuse, may be present in the end organ kidney due to perfusion abnormalities23.
MRI
MR venography may be performed, especially if the patient has renal impairment which does not permit the use of intravenous contrast 34.
Treatment and prognosis
- treatment of nephrotic syndrome: steroids and immune-suppression therapy
- treatment of underlying renal cell cancer includes surgery for early-stage disease
- anticoagulation therapy with coumadin/Warfarin
Complications
Recognised complications of RVT include
-<p><strong>Renal vein thrombosis (RVT)</strong> can be either from "bland" thrombus or tumour thrombus (extension of tumor into the vein). There are numerous aetiologies for bland thrombus, but it most commonly occurs in the hypercoagulable <a href="/articles/nephrotic-syndrome">nephrotic syndrome</a>. Renal vein thrombus is commoner on the left side, presumably due to the left renal vein being considerably longer than the right.</p><h4>Pathophysiology</h4><ul>- +<p><strong>Renal vein thrombosis (RVT)</strong> can be either from "bland" thrombus or tumour thrombus (extension of tumor into the vein). There are numerous aetiologies for bland thrombus, but it most commonly occurs in the hypercoagulable <a href="/articles/nephrotic-syndrome">nephrotic syndrome</a>. Renal vein thrombus is commoner on the left side, presumably due to the left renal vein being considerably longer than the right.</p><h4>Pathophysiology</h4><ul>
- +<li>
- +<a href="/articles/sickle-cell-disease">sickle cell disease</a><sup>2</sup>
- +</li>
- +<li><a href="/articles/systemic-lupus-erythematosus">systemic lupus erythematosus</a></li>
- +<li><a href="/articles/amyloidosis">amyloidosis</a></li>
-<li>lymphoma <sup>4</sup>- +<li>lymphoma<sup>5</sup>
-</ul><h5><strong> CT</strong></h5><p>As with venous thrombosis elsewhere, the thrombosis is observed as a filling defect during venous phase imaging following intravenous contrast. Changes in the attenuation, either focal or diffuse, may be present in the end organ kidney due to perfusion abnormalities <sup><span style="font-size:10.8333px; line-height:17.3333px">2</span></sup><span style="line-height:1.6">. </span></p><h5>MRI</h5><p>MR venography may be performed, especially if the patient has renal impairment which does not permit the use of intravenous contrast <sup>3</sup>. <sup> </sup></p><h4>Treatment and prognosis</h4><ul>- +</ul><h5><strong> CT</strong></h5><p>As with venous thrombosis elsewhere, the thrombosis is observed as a filling defect during venous phase imaging following intravenous contrast. Changes in the attenuation, either focal or diffuse, may be present in the end organ kidney due to perfusion abnormalities <span style="font-size:10.8333px; line-height:17.3333px"><sup>3</sup></span>. </p><h5>MRI</h5><p>MR venography may be performed, especially if the patient has renal impairment which does not permit the use of intravenous contrast <sup><span style="font-size:10.8333px; line-height:17.3333px">4</span></sup>. <sup> </sup></p><h4>Treatment and prognosis</h4><ul>
References changed:
- 2. Kawashima A, Sandler C, Ernst R, Tamm E, Goldman S, Fishman E. CT Evaluation of Renovascular Disease. Radiographics. 2000;20(5):1321-40. <a href="https://doi.org/10.1148/radiographics.20.5.g00se141321">doi:10.1148/radiographics.20.5.g00se141321</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/10992021">Pubmed</a>
- 4. Chauhan A, Garg N, Menias C, Devine C, Bhosale P, Balachandran A. Tumor Thrombus as a Rare Presentation of Lymphoma: A Case Series of 14 Patients. AJR Am J Roentgenol. 2015;204(4):W398-404. <a href="https://doi.org/10.2214/AJR.14.12782">doi:10.2214/AJR.14.12782</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/25794089">Pubmed</a>
- 3. Tempany C, Morton R, Marshall F. MRI of the Renal Veins. J Comput Assist Tomogr. 1992;16(6):929-34. <a href="https://doi.org/10.1097/00004728-199211000-00019">doi:10.1097/00004728-199211000-00019</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/1430444">Pubmed</a>
- 5. Saborio P & Scheinman J. Sickle Cell Nephropathy. J Am Soc Nephrol. 1999;10(1):187-92. <a href="https://doi.org/10.1681/ASN.V101187">doi:10.1681/ASN.V101187</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/9890326">Pubmed</a>
- 5. Saborio P & Scheinman J. Sickle Cell Nephropathy. J Am Soc Nephrol. 1999;10(1):187-92. <a href="https://doi.org/10.1681/ASN.V101187">doi:10.1681/ASN.V101187</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/9890326">Pubmed</a>
- 3. Tempany CM, Morton RA, Marshall FF. MRI of the renal veins: assessment of nonneoplastic venous thrombosis. J Comput Assist Tomogr. 1992;16 (6): 929-34. <a href="http://www.ncbi.nlm.nih.gov/pubmed/1430444">Pubmed citation</a><span class="ref_v3"></span>
- 4. Chauhan A, Garg N, Menias CO, Devine CE, Bhosale PR, Balachandran A. Tumor thrombus as a rare presentation of lymphoma: a case series of 14 patients. AJR Am J Roentgenol. 2015 Apr;204(4):W398-404.
- 2. Kawashima A, Sandler CM, Ernst RD et-al. CT evaluation of renovascular disease. Radiographics. 2000;20 (5): 1321-40. <a href="http://radiographics.rsna.org/content/20/5/1321.full">Radiographics (full text)</a> - <a href="http://www.ncbi.nlm.nih.gov/pubmed/10992021">Pubmed citation</a><span class="ref_v3"></span>
- 2. http://jasn.asnjournals.org/content/10/1/187.full.pdf