Acute gastritis

Acute gastritis is a broad term that encompasses a myriad of causes of gastric mucosal inflammation.

Depends on the aetiology (see below).

  • asymptomatic
  • epigastric pain/tenderness
  • nausea and vomiting
  • loss of appetite
  • infection: H. pylori (most common)
  • systemic illness: trauma and burns
  • pharmacological/medication: NSAIDS
  • autoimmune
  • caustic ingestion
  • acid/alkali ingestion
  • immunosuppression/AIDS-related 
    • cytomegalovirus
    • candida albicans
    • histoplasmosis
    • cryptosporidiosis
    • toxoplasmosis
  • eosinophilic gastritis

CT findings can suggest gastritis and detect complications such as gastric perforation, however, often gastritis and tumours cannot be easily differentiated on CT. Moreover, causes of gastritis cannot be determined on CT. Both circumstances require clinical/lab correlation, probable endoscopy examination and tissue biopsy 1-2.

CT findings suggestive of gastritis include:

  • gastric wall oedema: measuring the HU may be useful to differentiate oedema from low attenuation neoplastic lesion
  • halo sign: mucosal enhancement surrounded by submucosal and gastric wall oedema
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Article information

rID: 21042
Section: Gamuts
Tag: cases
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