The Number of Metastatic Lymph Nodes is a Useful Predictive Factor for Recurrence after Surgery for Nonmetastatic Nonfunctional Neuroendocrine Neoplasm of the Pancreas

Table 1

Characteristics of the patients and histopathological features of the neoplasms.

Patients	77
Gender (M/F)	45/32
Mean age (yrs)
BMI
ASA score
1-2	66 (85.7%)
3-4	9 (14.3%)
Type of surgery
PD	22 (28.6%)
DP	50 (64.9%)
TP	5 (6.5%)
Tumor
T1–T2	46 (59.7%)
T3–T4	31 (40.3%)
Resection margin
R0	72 (93.5%)
R1	5 (6.5%)
Grading
NET G1	36 (46.8%)
NET G2	37 (48.1%)
NET G3	3 (3.9%)
NEC G3	1 (1.2%)
Mitotic count
<2	54 (70.1%)
2-20	21 (27.3%)
>20	2 (2.6%)
Ki67
<3%	36 (46.8%)
3-20%	37 (48.1%)
>20%	4 (5.1%)
Number of harvested lymph nodes ()
Nodal involvement
N0	52 (67.5%)
N1	16 (20.8%)
N2	9 (11.7%)
LNR ()

PD: pancreaticoduodenectomy; DP: distal pancreatectomy; TP: total pancreatectomy. Continuous data are expressed as deviation; nodal invasion is reported as proposed in the methods section. pNENs: pancreatic neuroendocrine neoplasms; pNECs: pancreatic neuroendocrine carcinomas.