HER2 aberrations and heterogeneity in cancers of the digestive system: Implications for pathologists and

Nicola Fusco1, Silvano Bosari1

  • 1Nicola Fusco, Silvano Bosari, Division of Pathology, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, 20122 Milan, Italy.

Insights

This review explores Human Epidermal growth factor Receptor 2 (HER2) alterations in digestive cancers. While HER2 testing offers therapeutic potential, further research is needed to improve patient outcomes.

Area of Science:

  • Oncology
  • Molecular Biology
  • Gastroenterology

Background:

  • Digestive system cancers have entered the molecular era, yet mortality rates remain high.
  • Human Epidermal growth factor Receptor 2 (HER2) has been investigated for its prognostic and therapeutic roles in digestive tumors with varied outcomes.
  • Emerging guidelines for HER2 testing and treatment exist, particularly for gastric and colorectal cancers, but advancements are still required.

Purpose of the Study:

  • To provide a comprehensive overview of current knowledge regarding HER2 alterations in common digestive system tumors.
  • To discuss the practical implications of HER2 testing in clinical settings.

Main Methods:

  • Literature review and synthesis of existing research on HER2 in digestive cancers.
  • Analysis of current diagnostic and therapeutic strategies related to HER2.

Main Results:

  • HER2 alterations play a complex role in digestive system tumors, with significant heterogeneity in findings.
  • Current HER2 testing and treatment strategies are evolving, especially for gastric and colorectal cancers.
  • Operational aspects of HER2 testing require careful consideration for effective clinical application.

Conclusions:

  • Understanding HER2 alterations is crucial for advancing the management of digestive cancers.
  • Standardized and effective HER2 testing is essential for guiding targeted therapies.
  • Continued research is necessary to overcome current challenges and improve survival rates for patients with HER2-altered digestive tumors.