[Controversial issues surrounding sentinel lymph node biopsy in breast cancer]

Area of Science:

• Oncology
• Surgical Pathology

Background:

• Sentinel lymph node (SLN) biopsy is a critical staging procedure in various cancers.
• Controversies exist regarding optimal techniques and interpretation of SLN biopsy results.

Purpose of the Study:

• To discuss controversies surrounding SLN biopsy.
• To offer insights into enhancing SLN identification and diagnosis.

Main Methods:

• Review of current techniques for SLN identification, including radioisotope and blue dye methods.
• Discussion of intraoperative diagnostic methods like frozen sections and imprint cytology.
• Histological analysis of SLN for micrometastases on permanent sections.

Main Results:

• Combination of radioisotopes and blue dye with specific injection techniques may improve SLN identification rates.
• Preoperative lymphoscintigraphy aids in internal mammary SLN detection, though its clinical utility is under investigation.
• Intraoperative diagnosis of SLN metastases is essential for immediate treatment decisions, but limitations exist for micrometastasis detection.

Conclusions:

• SLN micrometastases are prognostically significant and detectable via detailed histological examination.
• SLN biopsy may be beneficial for specific patient groups, such as those with large or high-risk DCIS.
• The accuracy of SLN biopsy following neoadjuvant chemotherapy requires further validation.