patient is 45 yrs of age, had a problem of obstructive jaundice in october 2009, doctor inserted a plastic stent which was then replaced by metal stent. after this treatment now (june 2010), again the problem of jaundice is appearing with abdominal pain & fever. On consulting the doctor, the doctor says, the stent is blocked? What exactly the problem is and what is the best treatment option? Also tell that if the stent is inserted in the common billiary duct, why not to remove the gall bladder?