Clinicopathological features and prognostic factors associated with gastroenteropancreatic mixed neuroendocrine non-neuroendocrine neoplasms in Chinese patients

Table 1 Patients’ characteristics

Variable	Frequency (n)	Ratio (%)
Gender
Male	34	73.9
Female	12	26.1
Age (yr)	66 (41-84)
< 65	20	43.5
≥ 65	26	56.5
Location
Stomach	35	76.1
Intestine	9	19.6
Pancreas	2	4.3
Size (cm)	5.4 (0.5-18)
< 5 cm	25	54.3
≥ 5 cm	21	45.7
Ki- 67 index
< 50%	17	37.0
≥ 50%	29	63.0
Proportions of two components
NEC higher	28	60.9
AC higher	18	39.1
Histological grade of adenocarcinoma
Moderately differentiated	13	28.3
Poorly differentiated	33	71.7
Neuroendocrine component
NET	0	0
NEC	46	100
Lymph node metastasis
Presence	34	73.9
Absence	12	26.1
Vascular tumor thrombus
Presence	26	56.5
Absence	20	43.5
Neurological recidivism
Presence	27	58.7
Absence	19	41.3
Distant metastasis
Presence	14	30.4
Absence	32	69.6
Clinical TNM stage
I + II	13	28.3
III	23	50.0
IV	10	21.7

NET: Neuroendocrine tumors; NEC: Neuroendocrine carcinomas.