Case Report: A case of incidentally discovered isolated gastric plasmacytoma - Summary - MDSpire

Case Report: A case of incidentally discovered isolated gastric plasmacytoma

  • By

  • Ya-nan Zhang

  • Qing-xin Li

  • Lin-chong Ma

  • Yong-tai Jin

  • Wen-qi Li

  • Jin-chen Du

  • July 7, 2026

  • 0 min

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Objective:

To report a case of primary solitary gastric plasmacytoma and review its clinical features, diagnostic approaches, therapeutic strategies, and prognosis.

Approach:
  • Case Presentation: A 53-year-old male presented with persistent acid reflux and heartburn. Gastroscopy identified a flat, elevated lesion in the gastric body, leading to endoscopic mucosal resection.
  • Diagnostic Assessment: Histopathology and immunohistochemistry confirmed the diagnosis of primary solitary gastric plasmacytoma, with exclusion of multiple myeloma through various tests.
Key Findings:
  • Gastric plasmacytoma is a rare subtype of extramedullary plasmacytoma, accounting for about 2% of cases.
  • The patient presented with nonspecific gastrointestinal symptoms and was initially misdiagnosed with chronic gastritis.
  • Histopathological examination revealed diffuse infiltration of monoclonal plasma cells, confirming the diagnosis.
  • The diagnosis was confirmed through histopathology, immunohistochemistry, and exclusion of multiple myeloma via various tests.
Interpretation:

This case emphasizes the need to consider gastric plasmacytoma in patients presenting with atypical gastric lesions and nonspecific gastrointestinal symptoms.

Limitations:
  • Lack of large-scale clinical studies on primary gastric plasmacytoma limits understanding of its etiology and prognosis.
  • The rarity of the condition may lead to misdiagnosis or delayed diagnosis, impacting patient outcomes.
Conclusion:

This case report aims to enhance clinical awareness of gastric plasmacytoma and highlights the importance of thorough diagnostic evaluation.

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