Beyond conventional pathology: towards preoperative and intraoperative lymph node staging

Area of Science:

• Oncology
• Pathology
• Cancer Research

Background:

• Accurate lymph node metastasis detection is crucial for solid tumor treatment strategies and prognosis.
• Histological analysis of formalin-fixed paraffin-embedded (FFPE) sections is the current gold standard but has limitations in sensitivity for small metastatic deposits.
• Small tumor deposits are increasingly recognized as having significant prognostic implications.

Purpose of the Study:

• To critically review recent advances in novel lymph node staging technologies.
• To discuss the challenges and reasons why these new technologies have not yet replaced the current gold standard diagnostic method.

Main Methods:

• Review of current literature on lymph node staging technologies.
• Critical analysis of the performance and limitations of novel diagnostic approaches compared to FFPE histology.

Main Results:

• Histological analysis of FFPE sections remains the gold standard despite limitations in detecting micrometastases.
• Novel technologies face challenges in sensitivity, practicality, or cost-effectiveness, preventing widespread adoption.
• Intraoperative assessment of lymph nodes is not practically feasible with current FFPE histology.

Conclusions:

• Current novel lymph node staging technologies have not yet provided a superior alternative to traditional FFPE histological analysis.
• Further development is needed to overcome the limitations of existing methods and improve upon the established gold standard for lymph node metastasis detection.