Renal vein anomalies
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- updated 18 Aug 2022:
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There are several variations in renal venous anatomy. Some of these are specific to the left renal vein.
Left renal vein anomalies are generally classified into four types 2:
-
type I
- the ventral preaortic limb of the left renal vein is obliterated, but the dorsal retroaortic limb persists and joins the IVC in the normal position
-
type II
- results from the obliteration of the ventral preaortic limb of the left renal vein and the remaining dorsal limb turns into a retroaortic left renal vein (RLRV)
- left renal vein lies at the level of L4 to L5 and joins the gonadal and ascending lumbar veins before joining the IVC
-
type III
- is the circumaortic left renal vein or venous collar - due to the persistence of subsupracardial and intersupracardial anastomoses and the dorsal limb of the left renal vein.
- if all small retroaortic veins that empty into the IVC are considered, the incidence of a circumaortic left renal vein could be as high as 16%
-
type IV
- the ventral preaortic limb of the left renal vein is obliterated, and the remaining dorsal limb becomes the RLRV which courses obliquely and inferiorly to join left common iliac vein.
-
other (non-classified): can involve either kidney
- supernumerary renal veins
- late venous confluence 3
See also
-<p>There are several <strong>variations in renal venous anatomy</strong>. Some of these are specific to the left <a href="/articles/renal-vein-1">renal vein</a>.</p><p><strong>Left renal vein anomalies</strong> are generally classified into four types<sup> 2</sup>:</p><ul>-<li>-<strong>type I</strong> <ul><li>the ventral preaortic limb of the left renal vein is obliterated, but the dorsal retroaortic limb persists and joins the <a href="/articles/inferior-vena-cava-1">IVC</a> in the normal position</li></ul>-</li>-<li>-<strong>type II</strong><ul>-<li>results from the obliteration of the ventral preaortic limb of the left renal vein and the remaining dorsal limb turns into a <a href="/articles/retroaortic-left-renal-vein-1">retroaortic left renal vein (RLRV)</a>-</li>-<li>left renal vein lies at the level of L4 to L5 and joins the gonadal and ascending lumbar veins before joining the IVC</li>-</ul>-</li>-<li>-<strong>type III</strong><ul>-<li>is the <a href="/articles/circumaortic-left-renal-vein-1">circumaortic left renal vein</a> or venous collar - due to the persistence of subsupracardial and intersupracardial anastomoses and the dorsal limb of the left renal vein.</li>-<li>if all small retroaortic veins that empty into the IVC are considered, the incidence of a circumaortic left renal vein could be as high as 16%</li>-</ul>-</li>-<li>-<strong>type IV</strong> <ul><li>the ventral preaortic limb of the left renal vein is obliterated, and the remaining dorsal limb becomes the RLRV which courses obliquely and inferiorly to join left common iliac vein.</li></ul>-</li>-<li>-<strong>other (non-classified): </strong>can involve either kidney<ul>-<li><a href="/articles/supranumerary-renal-veins">supernumerary renal veins</a></li>-<li>late venous confluence <sup>3</sup>-</li>-</ul>-</li>- +<p>There are several <strong>variations in renal venous anatomy</strong>. Some of these are specific to the left <a href="/articles/renal-vein-1">renal vein</a>.</p><p><strong>Left renal vein anomalies</strong> are generally classified into four types<sup> 2</sup>:</p><ul>
- +<li>
- +<strong>type I</strong> <ul><li>the ventral preaortic limb of the left renal vein is obliterated, but the dorsal retroaortic limb persists and joins the <a href="/articles/inferior-vena-cava-1">IVC</a> in the normal position</li></ul>
- +</li>
- +<li>
- +<strong>type II</strong><ul>
- +<li>results from the obliteration of the ventral preaortic limb of the left renal vein and the remaining dorsal limb turns into a <a href="/articles/retroaortic-left-renal-vein-1">retroaortic left renal vein (RLRV)</a>
- +</li>
- +<li>left renal vein lies at the level of L4 to L5 and joins the gonadal and ascending lumbar veins before joining the IVC</li>
- +</ul>
- +</li>
- +<li>
- +<strong>type III</strong><ul>
- +<li>is the <a href="/articles/circumaortic-left-renal-vein-1">circumaortic left renal vein</a> or venous collar - due to the persistence of subsupracardial and intersupracardial anastomoses and the dorsal limb of the left renal vein.</li>
- +<li>if all small retroaortic veins that empty into the IVC are considered, the incidence of a circumaortic left renal vein could be as high as 16%</li>
- +</ul>
- +</li>
- +<li>
- +<strong>type IV</strong> <ul><li>the ventral preaortic limb of the left renal vein is obliterated, and the remaining dorsal limb becomes the RLRV which courses obliquely and inferiorly to join left common iliac vein.</li></ul>
- +</li>
- +<li>
- +<strong>other (non-classified): </strong>can involve either kidney<ul>
- +<li><a href="/articles/supranumerary-renal-veins">supernumerary renal veins</a></li>
- +<li>late venous confluence <sup>3</sup>
- +</li>
- +</ul>
- +</li>
Images Changes:
Image 3 MRI (T2 HASTE) ( create )
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