MKI67 and neoplasm: In particular, if we derive suggestions for additional studies in the context of local laboratory values, the prognostic analysis of ILC according to Ki67 is able to identify patients with a low-proliferative tumor (Ki67 < 6 %, in general less than 5 %) and patients with a ‘true’ high-proliferative tumors (Ki67 > 21 %, higher than 20 %).