Fig. 1
From: Evaluation of Ki-67 expression in feline non-ocular melanocytic tumours
a Heavily pigmented epithelioid melanoma. Haematoxylin and Eosin (HE), 400× magnification. b The same case after bleaching with potassium permanganate and oxalic acid, showing several mitotic figures (arrowheads). HE, 400× magnification. c The same case after bleaching and Ki-67 immunostaining. MIB1 immunohistochemistry (IHC), haematoxylin counterstain, 400× magnification