Hello, I can understand your concern. Adenoids are lymphoid tissues in children which are situated behind the nasal cavity. Usually, this lymphoid tissue is reduced in size and disappears on its own as the child ages. However, sometimes that is not the case the the tissue persists which causes breathing difficulty, speaking difficulty, snoring, abnormal development of teeth, mouth breathing, frequent ear infections etc. Unfortunately, medicines cannot cure it and the only permanent solution to all the above mentioned problems is surgical removal of this lymphoid tissue which has not disappeared on its own. It is a very common surgery performed in children and has very high success ratio. So please do not worry about the procedure. I hope this information helps you. Thank you for choosing HCM. I wish your sister feels better soon. Best, Dr. Viraj Shah