Fig. 3

a False-negative intraoperative frozen sentinel lymph node biopsy due to the small size of metastasis (× 10). b A permanent section slide in this specific case in which micrometastasis was detected (× 20)
a False-negative intraoperative frozen sentinel lymph node biopsy due to the small size of metastasis (× 10). b A permanent section slide in this specific case in which micrometastasis was detected (× 20)