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Autoimmune Gastritis C3887639

Published: July 22, 2026Updated: August 20, 2026

An autoimmune condition where the immune system attacks the stomach lining, particularly cells that produce acid and intrinsic factor. It can lead to vitamin B12 deficiency and anemia over time. Management usually includes B12 supplementation and monitoring for complications.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

Key facts at a glance

ICD-10
K30
ICD-11
DA00.0
Body system
gastrointestinal
Severity
moderate
Chronic
true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Abdominal pain or nausea

(gastrointestinal)

Noticeable symptoms that may vary in intensity over time.

Frequency: Common at all stages

Upper abdominal discomfort

(gastrointestinal)

Nausea

(gastrointestinal)

Loss of appetite

(gastrointestinal)

Pernicious anemia

(gastrointestinal)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

1

GI disease management

Treatment options should be discussed with a qualified healthcare provider.

lifestyle
2

Proton Pump Inhibitors

Acid-suppressing medications that help reduce gastric inflammation and alleviate symptoms. They decrease stomach acid production, allowing the gastric mucosa to heal and reducing discomfort associated with autoimmune gastritis.

medication
3

Vitamin B12 Supplementation

Replacement therapy for intrinsic factor deficiency导致的B12吸收障碍. Oral or intramuscular supplementation prevents megaloblastic anemia and neurological complications associated with pernicious anemia.

dietary

Additional treatment options

Iron Supplementation

Iron replacement therapy addresses iron deficiency anemia common in autoimmune gastritis due to reduced gastric acid and intrinsic factor production affecting iron absorption.

dietary

Regular Endoscopic Surveillance

Periodic upper endoscopy with biopsy to monitor disease progression, assess gastric mucosa healing, and screen for atrophic changes or gastric cancer risk.

monitoring

Dietary Modifications

Avoiding irritating foods such as spicy foods, alcohol, and excessive caffeine while maintaining a balanced diet rich in easily digestible nutrients to support gastric healing.

lifestyle

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Autoimmune Gastritis C3887639?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Lahner E, Zagari RM, Corazza GR, et al. International Guidelines for the Management of Autoimmune Gastritis. Gastroenterology. 2022;163(4):871-888.

guideline2022
2

Massironi S, Cavalcoli F, Rauscher E, et al. Autoimmune Gastritis: Current Understanding and Future Perspectives. Aliment Pharmacol Ther. 2021;54(5):527-543.

review2021
3

Rodriguez-Castro KI, Franceschi M, Noto A, et al. Clinical Manifestations and Long-term Outcomes of Autoimmune Gastritis: A Systematic Review and Meta-analysis. Am J Gastroenterol. 2020;115(8):1189-1208.

meta_analysis2020
4

Field M, Scharschmidt BF, Sleisenger MH. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. Chapter 54: Autoimmune Gastritis and Pernicious Anemia. 11th ed. Elsevier; 2021.

textbook2021

Medication Comparisons

Compare medications used to treat Autoimmune Gastritis C3887639. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy