“…In questionable cases or require additional supporting information, or, even, for differential diagnosis, the interpretation of clinical signs should always be correlated with laboratory tests, ultrasound exams or other methods of diagnostic imaging 2,13,47,51,52 . Ultrasound is a practical technique, fast and inexpensive, being considered as a screening assay in the initial evaluation of patients with suspected hepatobiliary tract disorders 7,8,12,13,53 , mainly due to its high sensitivity and specificity 1,16 . Through this examination, can visualize hepatomegaly in cases of cholestasis associated with obstruction, with the characteristic signs of increased volume of the organ and the presence of smooth margins, and there may be diffuse and increased echogenicity, and inadequate definition of the portal vessels; in biliary tract, is more common visualization increase of size in the gallbladder and dilation of ducts 12,16,17 .…”