Never heard of this before...it could be an acute shedding cycle of the hair in that area.
How long has the area been like this? If less than 4 months, I would give it more time to see if a new growth cycle will be emerging. I would not recommend surgery at the present time in case some new growth is on the horizon.
You might also recommend that she contact a dermatologist who has experience in treating hair loss without surgery.
And I wonder if applying minoxidil is a possibility...possibly the doctor can shed more light on this.