Fig. 1From: Metallothionein expression in feline injection site fibrosarcomasFeline injection site fibrosarcomas. A Tumour grade I. Small number of tumour cells show nuclear expression of Ki67. B Tumour grade II. Moderately numerous tumour cells show nuclear expression of Ki67. C Tumour grade III. Numerous tumour cells show nuclear expression of Ki67. Ki67 immunostaining with DAB, counterstaining with Mayer’s haematoxylin, 400xBack to article page