Toluidine blue dye as a breast localization marker.

Area of Science:

• Oncology
• Medical Imaging
• Surgical Pathology

Background:

• Accurate localization of breast lesions is crucial for effective surgical treatment.
• Visual markers are commonly used to guide surgeons during localization procedures.
• Comparing the efficacy of different dyes is essential for optimizing clinical practice.

Purpose of the Study:

• To compare the efficacy of toluidine blue and methylene blue as visual markers for breast localization.
• To evaluate dye intensity, diffusion, and patient-reported discomfort.
• To assess the influence of breast parenchymal patterns on dye performance.

Main Methods:

• In vitro and in vivo comparison of toluidine blue and methylene blue.
• Dye injection into mastectomy specimens and pre-mastectomy patients.
• Evaluation of dye staining intensity and diffusion over varying time periods.
• Assessment of patient-reported pain during dye injection.

Main Results:

• Toluidine blue demonstrated more intense staining and less diffusion than methylene blue in longer diffusion time studies.
• No significant difference in staining intensity or diffusion was observed between the dyes for localizations performed up to 2 hours before biopsy.
• Patients reported less discomfort with toluidine blue injections compared to methylene blue.
• Breast parenchymal pattern did not correlate with dye intensity or diffusion.

Conclusions:

• Toluidine blue is a potentially superior visual marker for breast localization due to less patient discomfort and more favorable staining characteristics.
• The choice of dye may depend on the expected time to biopsy, with toluidine blue showing advantages in longer procedures.
• Further research may validate toluidine blue as a preferred agent in breast localization.