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Fig. 1B —45-year-old man with intrapancreatic accessory spleen detected incidentally during workup for small-bowel submucosal tumor (patient 1). Transverse gray-scale sonography image shows homogeneous and isoechoic nodule (large arrows) with subtle hyperechoic rim and posterior acoustic enhancement (double arrows) in tail of pancreas (arrowheads). Echogenicity of this lesion is similar to that of pancreas (arrowheads) and spleen (S).