My daughter is 21 and just called me to tell me that she noticed this red lump on her leg. She is at college and they told her it's a Hermangioma. What I have been reading is that they come at birth . It's on her calf and I expect to take her to a vascular surgeon when she comes home for Christmas.
I am glad to see that on this site I have read at least 2 cases where they develop as adults. Does anyone have any additional information.