Clinicopathological evaluation of duodenal well-differentiated endocrine tumors

Table 2 Pathological findings of 11 patients with well-differentiated endocrine tumor

Patient No.	Location	Size (cm)	Histological type	Depth of invasion	Lymphatic invasion	Venous invasion	Mitotic count (HPF)	Ki67/MIB1 Index (%)	LN	Direct invasion	Treatment
1	Bulbs	0.2	WD	sm	0	0	< 2	< 1	0	0	LR
2	Bulbs	0.7	WD	sm	0	0	< 2	< 1	0	0	LR
3	Bulbs	1.1	WD	sm	0	0	< 2	< 1	0	0	LR
4	Bulbs	0.9	WD	mp	0	2	< 2	< 1	0	0	SG
5	Bulbs	1.1	WD	sm	0	2	< 2	< 1	0	0	SG
6	2nd portion	1.2	WD	sm	0	0	< 2	< 1	0	0	PD
7	Bulbs	0.7	WD	sm	0	1	< 2	< 1	0	0	LR
8	2nd portion	0.9	WD	sm	0	0	< 2	< 1	0	0	EMR
9	Bulbs	0.9	WD	sm	0	1	< 2	< 1	1 (No. 4 d)	0	SG
10	Bulbs	0.7	WD	sm	0	0	< 2	< 1	0	0	EMR
11	Bulbs	0.7	WD	sm	0	0	< 2	< 1	0	0	EMR

WD: Well-differentiated; LN: Lymph node metastasis; No. 4 d LN: Lymph node metastasis along the right gastroepiploic vessels; sm: Submucosa; mp: Muscularis propria; EMR: Endoscopic mucosal resection; LR: Local resection; SG: Subtotal gastrectomy; PD: Pancreaticoduodenectomy; 10HPF (high power field): At least 10 fields (at 40 × magnification) evaluated in area of highest mitotic density.