胰岛细胞瘤，有一薄层包膜包绕。右侧胰腺可见一些正常的胰岛。

An islet cell adenoma is seen here, separated from the pancreas by a thin collagenous capsule. A few normal islets are seen in the pancreas at the right for comparison.

左边是胰岛细胞瘤，右侧是正常胰腺。一些是功能性的，产生胰岛素导致低血糖症，产生促胃液素形成多发性胃、十二指肠溃疡( Zollinger-Ellison 综合症)。

The islet cell adenoma at the left contrasts with the normal pancreas with islets at the right. Some of these adenomas function. Those that produce insulin may lead to hypoglycemia. Those that produce gastrin may lead to multiple gastric and duodenal ulcerations (Zollinger-Ellison syndrome).

胰岛素免疫组化染色证实胰岛细胞瘤。

This is an immunohistochemical stain for insulin in the islet cell adenoma. Thus, it is an insulinoma.