Immunostaining features of perforin, granzyme B and TIA-1 in the portal tract area. The expression of perforin (A), granzyme B (B) and TIA-1 (C) in the portal tract area in biopsies without ACR is sporadic and significantly less than that with ACR (D, E and F, respectively). (Immunostaining with hematoxylin counter staining, ×200).
Cheng et al. Diagnostic Pathology 2012 7:148 doi:10.1186/1746-1596-7-148