Pancreatic neuroendocrine tumors: Are tumors smaller than 2 cm truly indolent?

Figure 1 Survival. A: Survival as a Function of Nodal Involvement. Kaplan-Meier survival curve illustrating patient survival based on lymph node involvement. The purple line represents patients with lymph node involvement; the green line represents patients without lymph node involvement. The difference between the two populations is statistically significant with a P value of 0.011; B: Survival as a Function of Neural Involvement. Kaplan-Meier survival curve illustrating patient survival based on perineural involvement. Patients with perineural involvement are represented by the purple line; patients without perineural involvement are represented by the green line. The difference between the two populations is statistically significant with a P value of 0.005; C: Survival as a function of lymphovascular involvement. Kaplan-Meier survival curve illustrating patient survival as a function of the presence or absence of lymphovascular involvement. The purple line represents patients with lymphovascular involvement; the green line represents patients without lymphovascular involvement. The difference between the two populations is characterized by a P value <0.0001; D: Survival rate as a function of tumor size. Kaplan-Meier survival curve illustrating patient survival rates as a function of tumor size. The green line represents patients with tumors smaller than 2 cm in diameter; the purple line represents patients with tumors larger than 2 cm in diameter. The difference between the two populations is characterized by a P value of 0.88 which was not statistically significant.