Chris, first have your mother get a second opinion. There are creams that can help. Also if her scalp is tight, a nice scalp massage might help to stimulate those sebum glands (dry scalp can sometime dry up the folical) also, does she see a skin doc or a family doc? It's possible her problem could be hormonal, with some natural herbs she could start to re-grow the hair in the areas. Do you have Nioxin available? Addy
http://www.nioxin.com/ I once worked with a lady that struggled with spots in her hair due to hormones, she was going thru the change of life and her hair became sparce and brittle. She started usin the nioxin line and in a few months her hair had grown back dramaticly, not completly but 100 times better than it had been. Do some research on this product if you are not already familliar with it....it may help.
Tell your mother I hope it gets better for her.
Cheers