High-grade pancreatic intraepithelial neoplasia diagnosed based on changes in magnetic resonance cholangiopancreatography findings: A case report

Table 1 Magnetic resonance cholangiopancreatography findings and causes of main pancreatic duct stenosis in high-grade pancreatic intraepithelial neoplasia

Case number	27
Sex (M:F)	17:10
Age (yr), median (range)	74 (60-83)
Localization of tumor
Head:body:tail	9:10:8
MRCP findings
MPD stenosis	3
MPD stenosis + caudal MPD dilatation	5
MPD stenosis + caudal MPD dilatation + caudal cyst formation	13
Caudal cyst formation	2
Others	4
MPD stenosis, yes:no	24:3
Histological type1
Flat type:low papillary type	6:21
Distribution of tumor
MPD:BD:MPD + BD	10:5:12
Causes of MPD stenosis
Fibrosis around MPD	4
Tumor itself	5
Fibrosis around MPD + tumor itself	15

¹Histological type of tumor was decided by Hanada’s classification[7].

M: Male; F: Female; MRCP: Magnetic resonance cholangiopancreatography; MPD: Main pancreatic duct; BD: Branch duct.