When my oldest (now 30 months) was an infant, he had a very large head. Off the growth charts large. They couldn't measure it in percentiles since it was well above the top of the growth scale. That's not to say he doesn't have a large head now, but they stop measuring at 12 months unless there's the indication of a problem.
A large head can be indicative of a number of things, from a potential for Autism, brain malformations, etc, or nothing at all. In our case, I have quite a large head myself and it put the ped's mind at ease.
HOWEVER, despite my son's head being that large, it never looked abnormally large to me like this little girl. To be honest, though, it looked to me that her's
appeared larger than it was because she was incredibly tiny (thin?) in the rest of her little body. Eleven pounds is not close to a normal birth rate in a seven month-old. My two sons' six month birth rates were both in the 18 + pound range. Both were about 70% percentile in weight. "Normal" would be listed around 17 pounds. My oldest weighed 9lbs when born in the 37th week. I know it's only a difference of six pounds, but when you're talking about a little being already so small, that is a substansial difference. It'd be like an adult who's supposed to weigh 120 weighing 70. Perhaps she was incredibly petite, but to be that petite would seem to point to a syndrome or lack of care.
Either way, she is/was a beautiful little girl, but with apologies to NG, she did not look healthy or normal. Whether it was because of her care or whether health issues somehow led to motive/neglect, I don't know. The lack of hair is fairly normal. I have a friend who has a daughter that lacked hair at the year mark.
Both my children were sleeping through the night by 10 weeks.
So sad. I almost wonder if she had a cluster of issues for which the parents didn't seek help. Maybe they thought it'd be easier for them if she died. Maybe that's all coincidental and it was straight-up abuse. Either way, it sounds like this little girl won't be coming home.