Table 2.

Comparison of characteristics between benign and malignant pancreatic schwannomas

	Benign (n = 60)	Malignant (n = 8)	P
Mean age (years)	56.3 ± 14.4 (20–87)	51.1 ± 17.7 (24–74)	0.358
Sex (male/female), (male %)	9:11 (45%)	3:5 (37.5%)	1.000
Mean size (cm)	5.2 ± 4.0 (1–20)	14.0 ± 10.3 (5–33)	0.004
Location
Uncinate	9 (15%)	0 (0%)	0.228
Head	22 (37%)	5 (71%)
Head + body	3 (5%)	0 (0%)
Body	14 (23%)	0 (0%)
Body + tail	6 (10%)	2 (29%)
Tail	6 (10%)	0 (0%)
Nature of tumor on imaging
Solid	17 (30%)	2 (25%)	0.845
Cystic	26 (46%)	3 (37.5%)
Solid + cystic	13 (23%)	2 (25%)
Not specified	4 (7.1%)	1 (12.5%)
Imaging characteristics
Well-defined margins	45 (96%)	2 (33%)	0.009
Presence of calcifications	5 (9.4%)	0 (0%)	1.000
Pancreatic duct/CBD dilation	2 (9.1%)	0 (0%)	1.000
Relation to nearby structures
No changes in nearby structures	12 (52%)	0 (0%)	< 0.001
Compressed/displaced vessels	9 (39%)	0 (0%)
Encasement of vessels	2 (8.7%)	3 (50%)
Invasion of viscera	0 (0%)	3 (50%)
Treatment
Pancreaticoduodenectomy	13 (22%)	3 (37.5%)
Pylorus-preserving pancreaticoduodenectomy	7 (10%)	0 (0%)
Central pancreatectomy	2 (3.0%)	0 (0%)
Distal pancreatectomy +/− splenectomy	13 (19%)	1 (12.5%)
Enucleation	8 (12%)	0 (0%)
Surgical resection NOS	13 (19%)	2 (25%)
Unresectable	0 (0%)	2 (25%)
Refused	3 (4.5%)	0 (0%)
Mean follow-up (months)	19.4 ± 16.0 (3–65)	16.3 ± 11.6 (4–28)
Died of disease	0	1