Acinar cystic transformation of the pancreas: A rare case report

Figure 2 Gross morphology and microscopic images of resection specimen. A: Gross morphology of resection specimen; B: Resection specimen consisting of multiple variable-sized cysts. The lesion is lined by cells with acinar differentiation, which have apical eosinophilic cytoplasmic granules and uniform nuclei. Cytologic atypia and mitotic figures are absent (hematoxylin and eosin, 200× magnification); C: Immunohistochemical positivity for the pancreatic enzyme trypsin is seen in the acinar cells (40× magnification); D: The lining cells are positive for CK19 and have strong and diffuse cytoplasmic staining for CK19 (40× magnification).