Pathological differential diagnosis of solid-pseudopapillary neoplasm and endocrine tumors of the pancreas

Table 2 Immunohistochemical results of SPN and PET

Case No.	AACT	AAT	Vim	NSE	Syn	CgA	CK	EMA	Ins	Som	Glu	PP	E-cad	Beta	Ki-67 (%)
SPN group
1	+	+	+	-	-	-	-	+	-	-	-	-	-	N/C	> 1
2	+	+	+	+	+	-	+	+	-	-	-	-	-	N/C	> 1
3	+	+	-	+	-	+	-	-	-	-	-	-	-	N/C	> 1
4	+	+	-	+	+	-	-	-	-	-	-	-	-	N/C	> 1
5	+	+	+	+	+	-	-	+	-	-	-	-	-	N/C	> 1
6	-	+	+	+	+	-	+	-	-	-	-	-	-	N/C	> 1
7	+	+	+	+	-	+	-	-	-	-	-	-	-	N/C	> 1
8	+	-	+	-	+	-	-	-	-	-	-	-	-	N/C	> 1
9	-	+	-	-	-	-	+	-	-	-	-	-	-	N/C	> 1
10	+	-	-	-	+	+	+	-	-	-	-	-	-	N/C	2
PET group
11	-	-	-	+	+	-	+	+	+	-	-	-	+	C/M	> 1
12	-	-	-	+	+	+	-	+	+	+		-	+	C/M	> 1
13	-	-	-	+	+	+	-	-	+	-	-	-	+	C/M	> 1
14	-	-	+	+	+	+	+	+	-	-	-	-	+	C/M	> 1
15	-	-	-	+	+	+	+	+	-	-	+-	+	+	C/M	> 1
16	-	-	-	+	+	+	+	-	-	-	-	-	+	C/M	> 1
17	-	-	+	+	+	+	+	+	+	+	-	-	+	C/M	> 1
18	-	-	-	+	+	+	+	+	+	-	-	-	+	C/M	> 1
19	+	-	-	+	+	+	-	-	-	-	-	-	+	C/M	2
20	-	-	-	-	+	+	-	-	-	-	-	-	+	C/M	> 1
21	+	-	-	+	+	+	+	+	+	-	-	-	+	C/M	> 1
22	-	+	-	-	-	+	+	-	-	-	-	-	+	C/M	3
23	-	+	+	-	+	-	+	+	-	-	-	-	+	C/M	> 1
24	+	-	+	-	-	-	-	+	-	-	-	-	+	C/M	4

N/C: Nuclear & cytoplasm; C/M: Cytoplasm & membrane; AACT: α-1-Antichymotrypsin; AAT: α-1-Antitrypsin; Vim: Vimentin; NSE: Neuron-specific enolase; Syn: Synaptophysin; CgA: Chromogranin; CK: Cytokeratin; Ins: Insulin; Som: Somatostatin; Glu: Glucagon; E-cad: E-cadherin.