I second what others have said. Collect copies of your medical records and MRI's and seek out the opinion of an MS specialist. Regardless, you need a new neurologist that will listen to you and not dismiss your symptoms. This guy sounds like a real jerk!

I have a venous angioma too. I was just told it was a congenital abnormality that some people just have in their brains. It doesn't cause any problems except in RARE circumstances.
I don't know how accurate this site is but you might want to read this about the venous angioma.
http://www.brain-aneurysm.com/dva.html

On top of that I have the classic ovoid MS lesions and elevated IgG index and IgG synthesis in my spinal tap (no oligoclonal bands) so they diagnosed MS. The venous angioma, again, was just viewed as incidental and unrelated...kind of like having a birth mark in your brain!
Good luck and keep us posted.