Molecular Testing in Breast Cancer: A Guide for Surgical Pathologists

Area of Science:

• Oncology
• Genomics
• Pathology

Background:

• Invasive breast carcinoma diagnosis necessitates precise treatment strategies.
• Genomic alterations play a crucial role in breast cancer progression and treatment response.

Purpose of the Study:

• To summarize clinically significant genomic alterations in breast cancer for surgical pathologists.
• To provide an overview of biomarker testing and the molecular testing process.
• To highlight preanalytical factors impacting molecular test accuracy.

Main Methods:

• Review of current literature on genomic alterations in breast cancer.
• Description of biomarker testing methodologies, including multigene expression assays and mutation profiling.
• Discussion of preanalytical considerations for tissue handling and preparation.

Main Results:

• Identification of key genomic alterations relevant to invasive breast carcinoma.
• Explanation of how biomarker testing directs treatment decisions.
• Emphasis on the importance of tissue quality for reliable molecular results.

Conclusions:

• Biomarker testing is integral to personalized treatment of invasive breast carcinoma.
• Surgical pathologists require knowledge of genomic alterations and testing processes.
• Attention to preanalytical variables is critical for high-fidelity molecular pathology results.