fig2
![Orbital lesions, an exceedingly rare site of neuroendocrine tumor metastasis](https://image.oaes.cc/452c474d-7005-4662-8aa2-b3bd8e8a41b4/1562.fig.2.png)
Figure 2. Well-differentiated neuroendocrine tumor (G1) of the ileo-cecal valve. (A) Mucosal ulceration (arrow, X10); (B) positivity of neoplastic nests for Chromogranin A (CgA) in the submucosa (X10); (C) muscolar layer neoplasitic invasion and positivity for CgA (X4); (D) piercing serosa positivity for CgA (arrow, X10); (E) serotonin stains the enterochromaffin cells (EC) (X20); (F) mindbomb homolog 1/ki-67 proliferation index below 2% (arrow, X40)