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Achlorhydria - Wikipedia, the free encyclopedia

Achlorhydria

From Wikipedia, the free encyclopedia

Achlorhydria
Classification and external resources
Hydrogen chloride (major component of gastric acid)
ICD-10 K31.8
ICD-9 536.0
DiseasesDB 29513
eMedicine med/18 
MeSH D000126

Achlorhydria and hypochlorhydria refer to states where the production of gastric acid in the stomach is absent or low, respectively. It is associated with various other medical problems.

Contents

[edit] Signs and symptoms

The decreased acid level itself causes few symptoms, but low acid levels in the stomach are linked with bacterial overgrowth (as the stomach does not kill microbes normally present in food), which can manifest as diarrhoea or decreased absorption of nutrients or vitamins. Risk of particular infections, such as Vibrio vulnificus (commonly from seafood) is increased.

[edit] Causes

[edit] Diagnosis

90% of all patients with achlorhydria have detectable antibodies against the H+/K+ ATP-ase proton pump. The diagnosis is made if the gastric pH remains high (>4.0) despite maximum pentagastrin stimulation. High gastrin levels are often detected.

[edit] Treatment

Treatment focuses on addressing the underlying cause, supplementation of vitamins like vitamin B12 (which is poorly absorbed in the absence of intrinsic factor) in autoimmune disorders, and avoiding foods that may have a high microbial load, and in some cases the use of Betaine hydrochloride has been successful. Usually little or no treatment is necessary. Antibiotics may be needed in significant bacterial overgrowth.

[edit] Prognosis

Little is known on the prognosis of achlorhydria, although there have been reports of an increased risk of gastric cancer.[2]

[edit] References

  1. ^ El-Omar EM, Oien K, El-Nujumi A, et al (1997). "Helicobacter pylori infection and chronic gastric acid hyposecretion". Gastroenterology 113 (1): 15–24. PMID 9207257. 
  2. ^ Svendsen JH, Dahl C, Svendsen LB, Christiansen PM (1986). "Gastric cancer risk in achlorhydric patients. A long-term follow-up study". Scand. J. Gastroenterol. 21 (1): 16–20. doi:10.3109/00365528609034615. PMID 3952447. 

[edit] See also

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