Pancreatic neuroendocrine tumors.

Endocrine or pancreatic neuroendocrine tumors (PNET) were first cited in the 1950s; they may be sporadic or associated with hereditary syndromes, benign or malignant, functioning or non-functioning. Nowadays, NF-PNETs are the most frequent and their prevalence ranges from 50% to 91%. In our current series (including 70 cases, 33% malignant, 52 operated) the frequency was 72% as compared to 37% in the historical series.