MKI67 and lymphoma: Histopathological analysis (Table S1), with the aid of immunohistochemistry, revealed the identification of proteins among the lymphomas (n = 6) [19,28,29,43], which acted as markers, the majority (n = 3) being positive for CD138 [28,29,35] and for Ki-67 [28,29] (n = 2), in addition to other markers, such as CD4 [29], CD30, and CD43 [35].