Mr. Soonawalla is a specialist hepatobiliary and pancreatic surgeon (commonly called HPB surgeons). Surgeons specialised in this field deal with problems of the gall bladder, bile duct, liver and pancreas. HPB surgeons specialise in this field, rather than carrying out gall bladder surgery whilst having another field as their main area of specialisation. HPB surgeons are therefore able to deal with bile duct stones, and are able to repair bile ducts in case there has been any accidental damage at surgery.