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 Not a feature of CBD stone and explain in detail?
Clinical features of CBD stone CBD stone may be silent and are often discovered incidentally. In these patients, biliary colic, jaundice, clay coloured stools and darkening of the urine Fever and chills may be present in patients with choledocholithiasis and cholangitis Serum bilirubin, aminotransferases, and ALP are commonly elevated in patients with biliary obstruction but are neither sensitive nor specific for the presence of common duct stones Among these, serum bilirubin has the highest positive predictive value for the presence of choledocholithiasis Laboratory values may be normal in one third of Patients with choledocholithiasis Ref: Sabiston 20th edition Pgno:1494