1. Presented by Ralph Hruban, M.D. and prepared by Shiyama Mudali, M.D.

This patient presented with diverticulitis. He was otherwise asymptomatic. A pancreatic mass was found and was resected. The neoplasms had a mitotic count of 3 mitoses per 10 hpf and a Ki-67 labeling rate of 11%.

Which of the following is NOT a significant prognostic indicator for pancreatic neuroendocrine tumors?

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