It's not necessarily true that venous angiomas don't cause symptoms
because many of us out there are finding that they in fact do. On top
of the typical head aches there is also vertigo ,numbness in
extremities and a few others that some have mentioned. I myself have
experienced the vertigo which by the way was tested in every way
possible to rule out every other reason of cause and the headaches
which for years were just written off as migrains. Many of your old
school neurologists don't want to accept this as fact as it's not
textbook but the newer neuroloical studies are changing their way of
thinking and as my neurologist tells me she is learning along with me
as not enough is known about brain angiomas and what they thought they
knew...we are now rewriting the book...