Figure 17a. Acute graft rejection in a patient with a PTA transplant and subtle sonographic findings who underwent percutaneous biopsy. (a) Photomicrograph (original magnification, x100; hematoxylin-eosin stain) of a histologic specimen shows the focus of acinar inflammation and ductal inflammatory destruction by lymphocytes, characteristic of rejection (arrow). (b) Photomicrograph (original magnification, x100; hematoxylin-eosin stain) of another histologic specimen shows destruction of acinar cells by lymphocytes (arrow). The degree of infiltration is compatible with grade 4 moderate rejection.