<s>[INST] Dear Doctor.Our 2 year old keep throwing up food.He only wants water and beast fed.We have been told here in Russia where we are on holiday that he has an enlarged liver and pancreas problem.Our HAS NOT HAD any immunisatinon vaccine in the UK.Please help. [/INST] Thank you for asking on Chat Doctor. Let me mention that completing the immunization schedule is important for your child. Rather than considering the enlarged liver and bulky pancreas as the cause of his vomiting, let me consider all these free as the part of the same gastrointestinal problem your child has. To be certain what is his exact nature of problems, I would need to put my hands on his abdomen and also see the ultrasound report in details. One speculation that I can make is that he is on formula feed which is hard to digest and his liver and pancreas is striving hard to cope with the same and have increased in size in the process. When he cannot digest the food and undigested food from the previous meal is still present in his stomach, he simply vomits it out. Hope that helps. Feel free to revert in case of further queries if any. </s>