いわゆるdouble pylorusの1例

Double Pylorus, Report of a Case

　いわゆる“double pylorus”は欧米でも報告例が少なく，わが国でも近年数例が報告されているにすぎない．しかしX線検査や内視鏡検査の普及に伴って今後報告例が増えると思われる．

　また，報告例が少ないこともあってか，本症およびその類似疾患を文献的に検討してみると，種種の名称で呼ばれている．

　A 66 year-old man was admitted to our hospital because of epigastralgia. UGIS revealed the doubling of the pyloric channel which the communication between the gastric antrum and the duodenal bulb on the greater curvature. A round pit on the posterior wall of the gastric antrum near the greater curvature at the distance of the pylorus was seen endoscopically.

　Gross appearance of the resected specimen revealed double pylorus and gastroduodenal channel in the presence of a normal pylorus.

　Expressions such as double pylorus, pyloric diaphragm, antral mucosa band, and web used in the past probably described the same lesion, but we discribed the double pylorus as that formed by a nonsurgical extrapyloric connnection between the gastric antrum and the duodenal bulb. The literature on the subject is reviewed.