Korean J Gastroenterol.  2019 Jun;73(6):332-340. 10.4166/kjg.2019.73.6.332.

Nodular Gastritis as a Precursor Lesion of Atrophic and Metaplastic Gastritis

Affiliations
  • 1Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea. sunyoung@kuh.ac.kr

Abstract

BACKGROUND/AIMS
Chronic atrophic gastritis (CAG) and metaplastic gastritis (MG) are precancerous conditions of Helicobacter pylori (H. pylori)-related gastric cancer. This study aimed to identify the characteristics of nodular gastritis (NG) showing CAG or MG after nodule regression.
METHODS
H. pylori-infected patients with NG were included after upper gastrointestinal endoscopy. Patients were excluded if their latest endoscopy had been performed ≤36 months after the initial diagnosis of NG. Small-granular-type NG was defined as the condition with 1-2 mm regular subepithelial nodules. Large-nodular-type NG was defined as those with 3-4 mm, irregular subepithelial nodules. The endoscopic findings after nodule regression were recorded.
RESULTS
Among the 97 H. pylori-infected patients with NG, 61 showed nodule regression after a mean follow-up of 73.0±22.0 months. After nodule regression, 16 patients showed a salt-and-pepper appearance and/or transparent submucosal vessels, indicating CAG. Twenty-nine patients showed diffuse irregular elevations and/or whitish plaques, indicating MG. Sixteen patients with other endoscopic findings (14 normal, one erosive gastritis, and one chronic superficial gastritis) showed a higher proportion of H. pylori eradication (12/16, 75.0%) than those in the CAG group (5/16, 31.3%) and MG group (6/29, 20.7%; p=0.001). Patients with small-granular-type NG tended to progress toward CAG (14/27, 51.9%), whereas those with large-nodular-type NG tended to progress toward MG (25/34, 73.5%; p<0.001).
CONCLUSIONS
In patients with a persistent H. pylori infection, NG tended to progress to CAG or MG when the nodules regressed. Small-granular-type NG tended to progress to CAG, whereas large-nodular-type NG tended to progress to MG.

Keyword

Gastritis; Lymphoid tissue; Atrophy; Metaplasia

MeSH Terms

Atrophy
Diagnosis
Endoscopy
Endoscopy, Gastrointestinal
Follow-Up Studies
Gastritis*
Gastritis, Atrophic
Helicobacter pylori
Humans
Lymphoid Tissue
Metaplasia
Precancerous Conditions
Stomach Neoplasms

Figure

  • Fig. 1 Two main subtypes of nodular gastritis. (A) Small-granular-type nodular gastritis consisting of multiple 1–2 mm subepithelial nodules in the antrum. (B) Large-nodular-type nodular gastritis consisting of multiple 3–4 mm subepithelial nodules in the antrum.

  • Fig. 2 Follow-up endoscopic findings after nodule regression. (A) Small-granular-type nodular gastritis with whitish discoloration was observed in the antrum. With the progress of nodule regression, a salt-and-pepper appearance was observed in the antrum. (B) The salt-and-pepper appearance extended up to the lesser curvature side of the body, which is consistent with the atrophic border. (C) With the progression of the salt-and-pepper appearance, whitish discoloration with transparent submucosal vessels was visible in the antrum. An atrophic border was found at the greater curvature side of the proximal antrum. (D) Prominent submucosal vessels were observed from the antrum extending up to the lower body. The endoscopic diagnosis was consistent with chronic atrophic gastritis. (E) Large-nodular-type nodular gastritis was noticed in the distal antrum. (F) The nodules extended up to the proximal antrum. Some of the large nodules were closer to the diffuse irregular mucosal elevations observed in metaplastic gastritis than the nodules observed in nodular gastritis. (G) On a retroflexed view, diffuse irregular elevations were observed on the lesser curvature side of the body. A villous appearance was noted on the surface of whitish elevated lesions. (H) Diffuse irregular elevations were observed with whitish discoloration, indicating intestinal metaplasia. The endoscopic diagnosis was consistent with metaplastic gastritis.

  • Fig. 3 Study flow of the 97 H. pylori-infected patients with nodular gastritis. The asterisks in parenthesis indicate the numbers of patients in whom H. pylori was eradicated. In total, 25 patients with large-nodular-type nodular gastritis (including six patients in whom H. pylori was eradicated) showed metaplastic gastritis on follow-up endoscopy, whereas 14 patients with small-granular-type nodular gastritis (including five patients in whom H. pylori was eradicated) showed chronic atrophic gastritis. Most of the patients with persistent nodules showed the same pattern on follow-up endoscopy; however, two patients with small-granular-type nodular gastritis progressed to large-nodular-type nodular gastritis. H. pylori, Helicobacter pylori.

  • Fig. 4 Different prognosis of small-granular-type nodular gastritis according to the presence of a H. pylori infection. (A) Small-granular-type nodular gastritis was diagnosed along with a H. pylori infection in a 42-year-old woman. (B) Salt-and-pepper appearance was observed at the lesser curvature side of the lower body. (C) Four years after the H. pylori eradication, several linear hyperemic streaks were observed at the greater curvature side of the antrum. The endoscopic diagnosis was consistent with chronic superficial gastritis. (D) A salt-and-pepper appearance was no longer observed in the lower body. (E) Small-granular-type nodular gastritis was diagnosed along with a H. pylori infection in a 36-year-old man. (F) Small- and regular-sized nodules were extending up to the proximal antrum. (G) After eight years of persistent H. pylori infection, the nodules showed irregularity. (H) The size of the nodules increased with irregular changes. The endoscopic diagnosis was large-nodular-type nodular gastritis. H. pylori, Helicobacter pylori.


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