Journal of Gastric Cancer

The Korean Gastric Cancer Association (대한위암학회)
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Oxyntic Gland Neoplasms - From Adenoma to Advanced Gastric Cancer: A Review of 29 Cases

  • Gi Hwan Kim (Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine) ;
  • Jun Su Lee (Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine) ;
  • Jeong Hoon Lee (Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine) ;
  • Young Soo Park (Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine)
  • Received : 2024.05.14
  • Accepted : 2024.07.13
  • Published : 2024.10.01
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Abstract

Purpose: Oxyntic gland neoplasm (OGN) is a rare condition that can be classified as oxyntic gland adenoma (OGA) or gastric adenocarcinoma of fundic-gland type (GA-FG). GA-FG primarily presents as early gastric cancer, with only a few reported cases of advanced gastric cancer (AGC). We aimed to investigate the clinicopathological features of OGN and describe an aggressive variant. Materials and Methods: We investigated a total of 29 cases, including a patient with double primary cases, diagnosed with OGN or differentiated-type adenocarcinoma with GA-FG morphology, between November 2016 and April 2022. We analyzed 54 pathological specimens and reviewed their clinicopathological, endoscopic, and histological features. The lesions were reclassified as OGA or GA-FG, and immunohistochemical (IHC) staining for MUC-5AC and MUC-6 was performed on available resected GA-FG cases. Results: The median patient age was 65 years and males accounted for 58.6% of patients. Most cases occurred in the body horizontally (69.0%) and on the greater curvature side cross-sectionally (48.3%). Endoscopically, type 0-IIa (41.4%) and a subepithelial tumor-like appearance (24.1%) were the most common findings. Histologically, there were 8 cases of OGA (27.6%) and 21 cases of GA-FG (72.4%). In GA-FG, MUC-6 was positive in 13 cases (81.3%), whereas MUC-5AC was positive in 8 cases (50.0%). Three cases presented as AGCs. Conclusions: Although OGNs are generally considered low-grade, they can present as AGCs and may exhibit features of lymphovascular or perineural invasion. Recognizing the clinicopathological features and accurately diagnosing OGN are important for providing adequate treatment.

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References

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