Gastric diarrhea - Isigeri

Japanese: 胃性下痢 - いせいげり
Gastric diarrhea - Isigeri

Diarrhea caused by some cause in the stomach. In most cases, it is hypoacidity (decreased stomach acid), but it can also be hyperacidity (hyperacidity). The mechanism by which hypoacidity or anacidity causes diarrhea includes ascending migration and abnormal proliferation of indigenous intestinal bacteria, insufficient activation of pepsin in gastric juice, and malabsorption caused by insufficient secretion of pancreatic juice and bile due to decreased release of gastrointestinal hormones (secretin, cholecystokinin, pancreozymin) secreted from the duodenal mucosa. Hypoacidity is caused by chronic gastritis and atrophy of the gastric mucosa (reduction in gastric glands) as a phenomenon of aging. A special case is WDHA syndrome. WDHA is an abbreviation for watery diarrhea, hypokalemia, and anacidity of gastric juice, and is a tumor of cells that produce secretin-like polypeptide (VIP). Agastric diarrhea is diarrhea seen after gastrectomy, and is more likely to occur the larger the area of ​​resection. Even if the stomach is reconstructed using the Billroth II procedure (gastrojejunostomy with duodenal exclusion), digestive and absorption disorders and diarrhea are likely to occur. This is due to hypoacidity and the lack of stimulation of the release of gastrointestinal hormones (gastrin, secretin, etc.).

In addition, highly acidic diarrhea is seen in Zollinger-Ellison syndrome, which is a tumor of gastrin-producing cells.

[Hosoda Shiro]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

胃になんらかの原因があっておこる下痢で、胃液低酸(胃酸減少)の場合が多いが、高酸(過酸)のこともある。低酸や無酸で下痢がおこる仕組みには、腸内常在菌の上行性移動と異常増殖のほか、胃液中のペプシンの活性化不全、十二指腸粘膜から分泌される胃腸ホルモン(セクレチン、コレシストキニン・パンクレオザイミン)の放出低下に伴う膵液(すいえき)や胆汁の分泌不全でおこる消化吸収不良などが関与している。低酸は慢性胃炎や老化現象としての胃粘膜萎縮(いしゅく)(胃腺(いせん)の減少)によっておこる。特殊なものにWDHA症候群がある。WDHAは水様下痢、低カリウム血症、胃液無酸の略称で、セクレチン類似のポリペプチド(VIP)を産生する細胞の腫瘍(しゅよう)である。無胃性下痢は胃切除術後にみられる下痢で、切除範囲が大きいほどおこりやすく、ビルロートⅡ法(十二指腸を空置した胃‐空腸吻合(ふんごう))で再建した場合にも消化吸収障害、下痢がおこりやすい。これは低酸に加えて胃腸ホルモン(ガストリンやセクレチンなど)放出刺激がおこらないためである。

 なお、高酸性下痢はガストリン生産細胞の腫瘍であるゾリンジャー‐エリソンZollinger-Ellison症候群でみられる。

[細田四郎]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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