To recap and expand...
Just a couple quick thoughts on Parkes Weber Syndrome and Klippel Tranaunay Syndrome.
The MAJOR difference between PWS and KT is that PWS is 'high flow', where as KT is 'low flow'. High flow results from the involvement of shunting by way of AV fistulas. Something not inherent to KT. As a result, PWS eventually results in high flow cardiac failure.
Also, the treatment of the two diseases can be different, and doctors familiar with KT may not always realize this. Specifically, debulking and vein stripping will very likely result in serious complications in PWS. Also, embolization (NBCA and particulate) and sclerotherapy should be used only when cardiac failure is moderate to severe, as these procedures often result in greater vascular malformation presentation in the long run, especially fistulas and nidus formations. Think Lernaean Hydra - get rid of one nidus/aneurysm and two more grow in its place - this has shown to be especially true for large scale deep tissue sclerotherapy sessions. Anti-angiogenic drugs (once/if they get approved) should help with this.
Finally, involvement of large aneurysms (greater than 30mm) should include blood thinners to prevent vascular trashing (I learned this one the hard way). A low molecular weight heparin, like Fragmin, seems to work well at 10,000 UI. The daily injections suck, but vascular episodes suck more.
Couple other q's that came my way...
Both KTS and PWS are known as 'genetic mosaic diseases' which result from mitotic recombination. They are NOT inheritable. So, if you are a parent, you did NOT give this to your child. If you have it, you CAN NOT give it to your offspring.
Also - KTS is extremely rare - PWS is even more so.
If you have KTS - there is the http://k-t.org/ website you may want to check out.
If you have PWS... let me know - I've yet to meet anyone else.
Both KT-S and PW-S can be disabling - although they present differently in each case. But, fret not - I'm living proof that you can live a full and happy life.
Sean