Adult focal β-cell nesidioblastosis: A case report

Figure 1 Small and slightly long T1 signal nodules were seen in the head of the pancreas with clear boundaries (A) and mild enhancement (B).

Figure 2 Endoscopic ultrasonography suggested a hypoechoic lesion in the head of the pancreas, with a hyperechoic nodule, about 1 cm × 1. 4 cm in size.

Figure 3 Preoperative and postoperative changes of fasting blood glucose, insulin and C-peptide.

Figure 4 Postoperative pathological results showed nesidioblastosis. A: Islet cells show hypertrophy, with pleomorphic changes in the nucleus, an increased and transparent cytoplasm; and immunohistochemistry analysis showed Ki-67 about 2% (+) (B), Syn (+)(C), MGMT (+), CD56 (-), CgA (-), Insulin (-), CK(+).