ULTRASOUND IMAGES OF BENIGN FOCAL PANCREATIC LESIONS

Focal fatty sparing of the pancreas
The uncinate process and ventral portion of the head of pancreas may sometimes appear hypoechoic in comparison with the rest of the gland (Fig. BELOW). This is due to a relative lack of fatty deposition and is often more noticeable in older patients, in whom the pancreas is normally hyperechoic.
Its significance lies in not confusing it with a focal pancreatic mass. The area of fatty sparing is well-defined, with no enlargement or mass effect, and is regarded as a normal variation in the ultrasound appearances. If doubt exists, CT will differentiate fatty sparing from true neoplasm.
image
The Ultrasound images uncinate process is relatively hypoechoic (arrows) because of fatty sparing.
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