Prognosis is dependent upon underlying aetiology and type of gastritis.
Erosive gastritis
Symptoms typically improve following discontinuation of or reduction in exposure to offending agent (e.g., non-steroidal anti-inflammatory drugs [NSAIDs]/alcohol).[2]Glickman JN, Antonioli DA. Gastritis. Gastrointest Endosc Clin N Am. 2001 Oct;11(4):717-40.
http://www.ncbi.nlm.nih.gov/pubmed/11689363?tool=bestpractice.com
[40]Moayyedi PM, Lacy BE, Andrews CN, et al. ACG and CAG clinical guideline: management of dyspepsia. Am J Gastroenterol. 2017;112(7):988-1013.
https://journals.lww.com/ajg/fulltext/2017/07000/acg_and_cag_clinical_guideline__management_of.10.aspx
http://www.ncbi.nlm.nih.gov/pubmed/28631728?tool=bestpractice.com
Helicobacter pylori infection
Prognosis is good although cure rates in the community are considerably lower than those described in clinical trials.[3]Chey WD, Howden CW, Moss SF, et al. ACG clinical guideline: treatment of Helicobacter pylori Infection. Am J Gastroenterol. 2024 Sep 1;119(9):1730-53.
https://journals.lww.com/ajg/fulltext/2024/09000/acg_clinical_guideline__treatment_of_helicobacter.13.aspx
http://www.ncbi.nlm.nih.gov/pubmed/39626064?tool=bestpractice.com
Autoimmune gastritis
Prognosis is excellent for B12 deficiency following replacement therapy with cyanocobalamin. There is a small increased risk for the development of gastric adenocarcinoma and gastric carcinoid.[96]Hsing AW, Hansson LE, McLaughlin JK, et al. Pernicious anemia and subsequent cancer: a population-based cohort study. Cancer. 1993 Feb 1;71(3):745-50.
http://www.ncbi.nlm.nih.gov/pubmed/8431855?tool=bestpractice.com
[97]Burkitt MD, Pritchard DM. Review article: pathogenesis and management of gastric carcinoid tumours. Aliment Pharmacol Ther. 2006 Nov 1;24(9):1305-20.
http://www.ncbi.nlm.nih.gov/pubmed/17059512?tool=bestpractice.com
Phlegmonous gastritis
The mortality rate for surgically treated patients was 20% (2/10) and for medically treated patients was 50% (13/26).[98]Kim GY, Ward J, Henessey B, et al. Phlegmonous gastritis: case report and review. Gastrointest Endosc. 2005 Jan;61(1):168-74.
http://www.ncbi.nlm.nih.gov/pubmed/15672083?tool=bestpractice.com