MKI67 and neuroendocrine neoplasm: The patient underwent distal pancreatectomy and splenectomy, and pathologic analysis of the lesion revealed a well-differentiated neuroendocrine tumor, Grade 1 (Ki-67 2.5%), measuring 15 mm, with lymphovascular invasion and metastasis to one of twenty-five lymph nodes (1/25) (pT1N1).