Suggest Treatment For Hemangioma In A 3 Years Old Child

I have a friend with a three year old little girl, she has a big hemangioma on the side of her head, there was chemo done when she was 6 months old to try and shrink it, they say it sets on a vein or artery that if buste she can bleed to death it never shrank with the chemo, starting at around 1 she started acting out, she bites, bangs her wad against the wall, she held her brothers he's under water, she is going in this week for patient evaluation, my question is could the chemo or the hngioma have caused any type of mental illness?