Pancreas Question 130

1. A 70-year-old man presents with a 5 cm mass in his pancreas.  A biopsy is performed and immunolabeling of the neoplastic cells supports neuroendocrine differentiation.  Somatic sequencing reveal mutations in the MEN-1 and ATRX genes. The most likely diagnosis is:
A.
B.
C.
D.
E.