Fig. 2From: Multiple endocrine neoplasia type 1 presenting with concurrent insulinoma and prolactinoma in early-adolescenceImmunohistochemical staining of pancreatic insulinoma. a Hematoxylin & eosin stain showing the tumor cells, b Congo red stain highlighting amyloid deposition, c Synaptophysin stain demonstrating neuroendocrine differentiation, and d Ki67 stain showing a proliferation index of 1–2%. Images acquired at 200X magnificationBack to article page