Dear , first don't worry and panic.
Jaundice is disease and symptom of other diseaes too means , I will explain , jaundice wl happen as part of some other disease , there are many other diseases in that jaundice may happen. So need to find out why jaundice has happened to Patient , when not able to find out with blood test and scanning then have to do biopsy to find out root cause of it. So u don't worry. Only Fallow opinion of your doctor , if u have still doubt u can ask your treating doctor and u can take second opinion of other gastroenterologist .
Next Steps
fallow up with your treating doctor or can have second opinion with other gastroenterologist.