Pancreatic neuroendocrine neoplasms: Magnetic resonance imaging features according to grade and stage

Table 2 Comparison of qualitative features between grades and stages

Feature	Grade				ENETS TNM stage1
	Total	G12	G2-32	P value	Total	I/II2	III/IV2	P value
Location				0.094				0.059
Head	24	11 (45.8)	13 (54.2)		23	7 (30.4)	16 (69.6)
Body	25	18 (72)	7 (28)		22	14 (63.6)	8 (36.4)
Tail	6	2 (33.3)	4 (66.7)		6	4 (66.7)	2 (33.3)
Margins				< 0.001				< 0.001
Well defined	39	28 (71.8)	11 (28.2)		35	24 (68.6)	11 (31.4)
Ill defined	16	3 (18.8)	13 (81.2)		16	1 (6.2)	15 (93.8)
Vasc. infiltration				0.022	-	-	-	-
Present	7	1 (14.3)	6 (85.7)
Absent	48	30 (62.5)	18 (37.5)
Liver metastases				0.002	-	-	-	-
Present	7	0 (0)	7 (100)
Absent	48	31 (64.6)	17 (35.4)
Atrophy3				0.446				0.151
Present	13	7 (53.8)	6 (46.2)		13	4 (30.8)	9 (69.2)
Absent	36	22 (61.1)	14 (38.9)		32	17 (53.1)	15 (46.9)
MPD dilation4				0.215				0.151
Present	13	6 (46.2)	7 (53.8)		13	4 (30.8)	9 (69.2)
Absent	36	23 (63.9)	13 (36.1)		32	17 (53.1)	15 (46.9)
CBD dilation4				0.264				0.275
Present	7	2 (28.6)	5 (71.4)		7	1 (14.3)	6 (85.7)
Absent	17	9 (52.9)	8 (47.1)		16	6 (37.5)	10 (62.5)

¹Four lesions were excluded from this analysis (minimally invasive surgery without lymphadenectomy);

²Number of cases/cases in row;

³Pancreatic head/body lesions;

⁴Pancreatic head lesions. Data are presented as numbers of cases. ENETS: European Neuroendocrine Society; TNM: Tumor-nodes-metastases.