In all 3 infants, sonography revealed the duct of the annular pancreas coursing in an oblique direction, cephalic and to the right,across the duodenum just distal to the dilated proximal duodenum.

• 这3个婴儿超声均显示环状胰管先倾斜走行到胰头，向右侧包绕扩张的十二指肠远端，然后汇入主胰管。