You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Rigler's triad consists of all except and explain in detail?
Gall stone ileus Passage of stone through a spontaneous biliary-enteric fistula leading to a mechanical bowel obstruction Clinical features Rigler's triad : Classic plain abdominal film triad of small bowel obstruction, pneumobilia & ectopic gallstone Ref: Sabiston 20th edition Pgno :1506-1507