<prompt> Which of the following is falseDilatation of the gallbladder with jaundice unlikely from gallstonesDilatation of the gallbladder with jaundice is due to gallstonesDilatation of a gallbladder with jaundice is due to periampullary carcinomaDilatation of gall bladder may be present in mirizzi syndrome.  <response>: Courvoisiers law states that in the presence of a palpably enlarged gallbladder which is non-tender and accompanied with mild painless jaundice, the cause is unlikely to be gallstones. Chronic gallstones usually cause fibrosis of gallbladder. 