MKI67 and neoplasm: The possibility of metastatic tissue on sentinel lymph node is higher as the tumor size increases41; most of our patients had tumor ranging from 1 to 5 cm (pT1c and pT2) and a high number of patients with tumoral grade 2 and 3, highly mitotic and high KI67, which also contribute to metastatic draining lymph nodes41,42.