Now my niece is 17 yrs old, she has her gall bladder removed when she was age less then 10. if i dont remember wrongly, she started with on and off fever for some time. She was brought to Mt. Alvenia hospital to have blood test, x-ray etc and could not diagnosis anything. Till one day, my sister insisted the doc to do a x-ray or scan on the gall bladder and found stones
The doc suggested to remove the stones and gall bladder. it was done through a small surgery, opened 3 small holes on her stomach to remove the stone and gall bladder. after the surgery, rested for 2 days and was discharged.
My sister used to stay with in law, they (in-law) used a lot oil in the cooking. Now they (my sis family) staying on their own, totally cut down on oily food.
if you want to know more, i can always check with my sister and update you again.