stones found in gb of size 24mm. how much serious it is? and what is its remedial solution.

My mother aged 85Yrs., has developed large breast lump(Size >5cm) in the left breast. Pl. suggest best supporive treatment at her age.

My relative who is a female child aged 15 years, suffered from pancreatis about 5 years back. She was admitted to hospital for 10 days where doctors managed her pain only. Now she has some pain in abdomen, it is diagnosed she has choledochal cyst Type IVA. Doctors suggest she should be operated upon and her INtrahepatic, UBD and Common bile Duct including gall bladder should be removed. As it is a major operation, I want to know who is best surgeon in Delhi or in India for this kind of surgery. Moreover I want to know if DUCTS are removed then surgically from small intestine a piece would be removed and surgically another DUCT will be created and put between Liver and DOUDENUM and how pancreas duct will be joined with this surgically created duct or it will be straight connected to DUODENUM. Nature has given us Ampulla and sphincter which open when DUCT sends bile and enzyem into doudenum and then it closes preventing back flow of DUODENUM content into BILE. After surgery how such back flow will be prevented and what precautions surgeon take that BILE does not leak?
Even if best surgeons are avaialble abroad, their names and hospitals details may please be provided.
If someone has already experienced this situation, his experience will be of great value.