my son was diagnosied with a gallbladder full of stones on an ultrasound 5 years ago. they repeated the ulta sound one month later and found no gallbladder. at the time he had a slight dialation of the bile duct . he has had trouble with stuck poop since he was born. they have had him on mirlax and mineral oil. the gallbladder was an accidental find. recently he went through a mrcp and cat scan and they still can not see gallbladder and his bile duct is 7mm dialated. what now?
Dear madam, there is a disorder called gallbladder dysplasia, but it is very rare. I've never heard that someone had gallbladder, and then it just disappeared. Only by surgical procedure it can be removed.  Contrast radiology tests you've mentioned are used to visualize contrast passage and if his gallbladder and cystic duct are full of stones then it won't be seen. But... Ct abdominal scan should definitely see gallbladder except it is tiny. It is not necessary to find out is gallbladder really there if your son doesn't have any symptoms related to it. In the future, laparoscopy can be always done, and it can solve your mystery for sure