Figure 10. Acute graft rejection in a patient with a PTA transplant. Power flow image shows nonspecific heterogeneity of the pancreatic graft parenchyma and graft swelling. Changes within the parenchyma are subtle. A small amount of peripancreatic fluid is seen anterior to the graft (arrow). Biopsy helped confirm acute rejection. Similar sonographic findings may be seen with graft pancreatitis.