Table 2.

Clinical data of patients with focal-type autoimmune pancreatitis (AIP) and pancreatic duct carcinoma (PD)

	Focal-type AIP n = 20 (± SD)	PD n = 30 (± SD)	p
Age (y)	65.25 ± 9.40	66.87 ± 8.45	0.539
Male/Female	11/9	18/12	0.953
Lesion size (mm)	33.54 ± 13.62	26.96 ± 7.78	0.061
IgG4 > 280 (mg/dl)	8
280≧IgG4≧135 (mg/dl)	7
Narrowing of main pancratic duct on ERP/MRCP	18
Pathological findings	9
Other organ involvement	6
Effectiveness of steroid therapy	15
cT Stagea
T1a		0
T1b		0
T1c		8
T2		22
T3		0
T4		0

ERP endoscopic retrograde pancreatography, MRCP magnetic resonance cholangiopancreatography

^aAccording to the 8th edition of the TNM classification of malignant tumors