I am a Homoeopath answering your question through Health care magic.
Your letter does not give the full details of the patient because Homoeopathy needs a detailed case taking in order to help patients. This is because Homoeopathy never treats the name of the disease but treats the patient. The age of the patient and the period of the disease is not clear.
In my opinion, there must have had an unexpected shock
or conflict in the life of your niece which might have caused the increased TLC
. The disease is fast developing and hence she needs a Homoeopathic remedy which acts fast or the remedy which a Homoeopath will select for curing the patient will be a fast acting remedy. The remaining things I cannot say with the very limited knowledge about the patient. You are lucky to be in India because there are lot of expert Homoeopaths in India . My advise to you is to take her to an expert Homoeopath at the earliest. I can assure that this case is curable.
Best wishes to for a speedy recovery through Homoeopathy
Dr. C. J. Varghese