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Molecular Classification of Endometrial Carcinoma: Insights From a Teaching Hospital

  • 0Department of Pathology, Faculty of Medicine, King Abdulaziz University and King Abdulaziz University Hospital, Jeddah, Saudi Arabia.
International Journal of Gynecological Pathology : Official Journal of the International Society of Gynecological Pathologists +

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February 21, 2025

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February 21, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

This study classified endometrial carcinoma molecular subtypes in Saudi Arabia, finding nonspecific molecular profile (NSMP) in 46% and mismatch repair (MMR) deficiency in 30%. P53 mutant tumors showed the worst prognosis, highlighting the importance of molecular profiling in endometrial cancer.

Area Of Science

  • Oncology
  • Molecular Pathology
  • Genetics

Background

  • Endometrial carcinoma exhibits molecular heterogeneity impacting prognosis and treatment.
  • Molecular signatures are crucial for understanding cancer subtypes.
  • Previous studies established distinct molecular classifications for endometrial cancer.

Purpose Of The Study

  • To determine the prevalence of specific molecular alterations in endometrial carcinoma.
  • To correlate molecular profiles with pathologic and clinical characteristics.
  • To implement molecular subtyping in a Saudi Arabian cohort.

Main Methods

  • Classified 100 endometrial carcinoma cases using immunohistochemistry for mismatch repair (MMR) proteins and p53.
  • Utilized Sanger sequencing for POLE gene analysis (Exons 9, 13, 14).
  • Correlated molecular findings with pathologic features and clinical data.

Main Results

  • Nonspecific molecular profile (NSMP) was prevalent (46%), followed by MMR deficiency (30%).
  • Tumors with p53 mutations exhibited the poorest prognosis.
  • No significant differences in pathologic characteristics were found across molecular subtypes.
  • Mutual molecular grouping was observed in 5% of cases.

Conclusions

  • The molecular subtype distribution in Saudi Arabia aligns with global findings.
  • Molecular profiling, including MMR, p53, and POLE analysis, is essential for understanding endometrial cancer heterogeneity.
  • P53 mutation status is a significant prognostic indicator in endometrial carcinoma.

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