Results In 50 patients, there were 54 PADs, of which 42 PADs located above papilla,7 located below papilla, 3 were papilla in the diverticula,2 located in the edge of diverticula.

• 结果50例患者中发现54个PAD,位于乳头上方42个,乳头下方7个,乳头开口于憩室内3个,开口于憩室缘2个。