Fig. 3From: 3D chick embryo chorioallantoic membrane model as an in vivo model to study morphological and histopathological features of feline fibrosarcomasFeline lymph node. Positive control of immunohistochemical reaction for Ki-67 (a) and PCNA (b) as nuclear pattern (brown precipitate). Negative controls for Ki-67 (c) and PCNA (d). IHC, magnification 400 ×Back to article page