I just asked my partner who is a doctor, and he said while Hospital Italiano does have the look of an old hospital, it is in the top 10 of Buenos Aires capital, however he said the best hospital is Los Arcos for any type of surgery. He also said if it's appendicitis you have to be operated right away it's not something that can wait even a few hours. Make sure you get the right advice on this, not something to ignore.