Here are some slides from my venogram of my Iliac Veins...
Dye injected in left iliac vein starting to flow upward...
Dye shoots through what may be a collateral over into right iliac vein...
now into right iliac and moving back up into inferior vena cava...
I am now seeking local treatment for this and hope to be treated if possible.
As this is a 2D view of whats happening, interpretation of what is really happening is difficult. I hope to get a 3D MRV to see what is really there.
The doctor performing the exam thought that it was a collateral vein that was transferring flow from the left iliac vein (LIV) to the right iliac vein (RIV) that had obviuosly formed due to some sort of blockage higher up in the inferior vena cava (IVC).
Treatment wasn't necessary because it seemed the problem had fixed itself.
I believe the MRV may find that this is not a collateral vein at all, but that the RIV is being compressed by the right iliac artery (RIA). This may be causing the blockage of the LIV which is forcing the portion of flow from the LIV over into the RIV.
I also think that there is indeed a collateral vein that may have formed on the RIV which actually wraps over the RIA (kinda looks like it cuts off the tip of the white triangle which I believe might be the impression of the RIA), which contributes to the apperance that a larger collateral is carrying flow from left to right when it may only be the bottom portion of the RIV which does this.
If this is not the case, I haven't taken measrements yet but my RIV would be substantially smaller then the left, which seems improbable. The compression case described above seems much more likely to me to occur.
Flow from the right leg is being hampered by the spillover from the left. This really fits well into explaing why my right leg is weaker than my left. It would also explain why my right leg could not effectively fight off a strep infection earlier this year - just not enogh blood flow. Dr. Sclafani said thqat numbness is more likely a nerve issue and I agree, but it has also been discussed here that nerves need oxygen to perform correctly - restore flow, restore nerve function!
Hopefully. I'll get a 3D pictre soon and treatment! Wish me luck and I hope this helps shed some light on some other cases of variant May-Thurner's out there!
If you can't explain it simply, you don't understand it well enough. - Al Einstein