Clinicopathological features and menin expression of pancreatic neuroendocrine neoplasm associated with multiple endocrine neoplasia type 1.

M-pNEN patients tend to develop spatially and temporally multifocal pNENs. However, M-pNEN patient prognosis is good with repeated surgeries at recurrence. Therefore, minimal resection with strict follow-up is recommended rather than extensive pancreatic resections for consideration of recurrence in M-pNEN.