Outcomes of nonresected main-duct intraductal papillary mucinous neoplasms of the pancreas

Table 3 Comparison of the main characteristics of patients in the nonsurgical subgroup with and without progression of malignancy of the main duct or mixed intraductal papillary mucinous neoplasm of the pancreas n (%)

Characteristic	Nonresected IPMN with malignant progression, n = 18	Nonresected IPMN without malignant progression, n = 32	P value
Age1 (yr), mean ± SD	73.0 ± 7	68.5 ± 8.0	0.06
Sex, male:female	9:9	19:13	0.56
With symptoms	11 (61)	24 (75)	0.34
Size of the MPD (mm), mean ± SE (median)1	11.5 ± 3.0 (7.0)	6.9 ± 0.4 (5.7)	< 0.05
Mixed form	13 (72)	29 (90)	0.11
Size of the BD1 (mm), mean ± SE (median)1	27.3 ± 4.3 (25.0)	22.2 ± 2.6 (17.0)	0.30
Tissue nodule or wall thickening2	8 (44)	7 (22)	0.11
Follow-up time after diagnosis (mo), median	29	30	0.6

¹At diagnosis;

²MPD and/or branch-duct cyst. BD: Branch duct; IPMN: Intraductal papillary mucinous neoplasm; MPD: Main pancreatic duct.