Infant haemangioma. This is on scalp.

My relative's daughter is 4 weeks old baby girl has haemangioma on scalp, vertex region, exactly little middle to backwards of vertex region. They live in village and visited nearby doctor, they told it looks like haemangioma, like almost sure, but told them to go for ultrasound to be very sure, and they will be travelling to the city to get all the tests done, baby is active, sleeps well, and when she is awake she is active with leg kicks and hand movements, she was 3.25kg at birth, except 300 grams of weight loss in first week, now she is at 4.5 kg, she is breast fed. They came to know about the mark after 4 weeks only, never observed it before, as the mark is very flat, not sure if the baby had it at birth itself as they noticed it now only, and hair growth looks normal on the mark also. attached the pic here, if it's really a haemangioma, how much should they be worried, in internet it says it will grow little by little and it wil require surgery if its near eyes, this is on scalp.