Internal Mammary Sentinel Lymph Node Biopsy in Early Breast Cancer Patients With Clinically Axillary Node -Positive

IM-SLNB is performed according to the pre-operative lymphoscintigraphy

Two syringes of 0.25\~0.5 mCi 99mTc-SC in 0.2\~1.0 mL volume were injected intraparenchymally into 2 quadrants of breast, at the 6 and 12 o'clock positions.

All IMSLNs were analyzed by histologic examination for future therapy planning.

lymphoscintigraphy was performed 0.5\~1.0 hour before surgery

Four milliliters of methylthioninium was injected intraparenchymally around the primary tumor 10 min before surgery