[Imaging techniques for axillary lymph node staging in breast cancer]

Area of Science:

• Oncology
• Radiology
• Surgical Pathology

Background:

• Axillary lymph node status is a critical prognostic factor in breast cancer.
• Axillary lymph node dissection is the gold standard for staging but involves significant postoperative complications.
• Current anatomical imaging techniques visualize axillary lymph nodes but have limitations in distinguishing metastatic involvement.

Purpose of the Study:

• To review the diagnostic capabilities of various imaging modalities for axillary lymph node assessment in breast cancer.
• To highlight the challenges in differentiating metastatic from normal axillary lymph nodes using current imaging technologies.

Main Methods:

• Review of diagnostic radiological tests including ultrasonography, mammography, computed tomography, and magnetic resonance imaging.
• Discussion of radionucleide studies and positron emission tomography for axillary lymph node evaluation.

Main Results:

• Anatomical imaging reveals metastatic lymph nodes as dense, enlarged, or spiculated.
• Reliably distinguishing metastatic from normal axillary lymph nodes remains a significant challenge across imaging modalities.
• Biochemical imaging methods like PET scans are limited by resolution constraints.

Conclusions:

• Accurate staging of breast cancer is hindered by the inability to reliably differentiate metastatic axillary lymph nodes using current imaging.
• Improved imaging techniques are needed to overcome the limitations in assessing axillary lymph node involvement, thereby enhancing breast cancer prognostication and treatment planning.