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Multiple simultaneous gastric carcinomas

C Wittekind1, M Klimpfinger, P Hermanek

  • 1Institute of Pathology, University of Leipzig, Germany.

British Journal of Cancer
|January 1, 1997
PubMed
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Multiple synchronous gastric cancers (MSCs) occur in 3.7% of patients and often present as early-stage tumors. These multiple tumors may arise from precancerous conditions with similar genetic alterations, impacting p53, c-erbB2, and ras expression.

Area of Science:

  • Oncology
  • Gastroenterology
  • Pathology

Background:

  • Multiple synchronous primary tumors (MSCs) in gastric cancer are a recognized clinical entity.
  • Understanding the incidence and characteristics of MSCs is crucial for diagnosis and treatment strategies.

Purpose of the Study:

  • To evaluate the incidence of multiple synchronous gastric carcinomas (MSCs).
  • To analyze the clinicopathological features and immunohistochemical profiles of MSCs.
  • To investigate the potential common origin of multiple gastric tumors.

Main Methods:

  • Retrospective analysis of 1664 gastric cancer patients.
  • Immunohistochemical analysis of p53, c-erbB2, ras, E-cadherin, and proliferative activity (PCNA) in MSCs.
  • Comparison of tumor stage and characteristics between solitary and multiple gastric cancers.

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Main Results:

  • MSCs were identified in 3.7% of patients (61/1664), totaling 134 carcinomas.
  • Early-stage MSCs were more frequently protruded (Type I) or superficial elevated (Type IIa) compared to solitary early cancers.
  • Immunohistochemistry revealed high positivity rates for ras (87%), c-erbB2 (59%), and p53 (33%).
  • Identical p53 and c-erbB2 expression patterns were observed in multiple tumors within the same patient.
  • No significant difference in survival was found between patients with solitary or multiple gastric carcinomas.

Conclusions:

  • Multiple synchronous gastric carcinomas occur at a notable rate and often present as early-stage disease.
  • The similar immunohistochemical profiles (p53, c-erbB2, E-cadherin) in multiple tumors suggest a common origin from precancerous conditions with shared genetic alterations.
  • Further research into the molecular mechanisms underlying MSCs is warranted.