Table 1 Patient demographics and clinicopathological characteristics.

From: Novel method for evaluating the indication for endoscopic papillectomy in patients with ampullary adenocarcinoma

Patients, n

57

Age, years, median (range)

71 (41–85)

Sex, male/female

36/21

Tumor size, mm, mean (range)

17.8 (5–47)

Type of treatment, n (%)

Endoscopic papillectomy

38 (66.7)

Surgical resection

19 (33.3)

Pathological subtype

Intestinal

43 (75.4)

Mixed

8 (14.0)

Pancreatobiliary

6 (10.5)

Overall stage, n (%)

0

8 (14.0)

IA

36 (63.2)

IB

4 (7.0)

IIA

2 (3.5)

IIIB

0

IIIA

7 (12.3)

T stage of primary tumor, n (%)

Tis

8 (14.0)

T1a (ampulla)

28 (49.1)

T1a (Oddi)

8 (14.0)

T1b

0

T2

7 (12.3)

T3a

5 (8.8)

T3b

1 (1.8)

Pathological grade, n (%)

Well differentiated

40 (70.2)

Moderately differentiated

13 (22.8)

Poorly differentiated

4 (7)

Invasion

Lymphatic, n (%)

15 (26.3)

Venous, n (%)

10 (17.5)

Perineural, n (%)

6 (10.5)

Lymph node metastasis, n (%)

7 (12.3)

  1. Overall disease stage and T stage of the primary tumor are based on the World Health Organization classification (0, TisN0M0; IA, T1aN0M0; IB, T1b/T2N0M0; IIA, T3aN0M0; IIB, T3bN0M0; IIIA, T1a/T1b/T2/T3N1M0). Tis, carcinoma in situ; T1a(ampulla), tumor limited to the ampulla of Vater; T1a(Oddi), tumor limited to the sphincter of Oddi; T1b, tumor extends beyond the sphincter of Oddi and/or into the duodenal submucosa; T2, tumor invades the muscularis propria of the duodenum; T3a, tumor invades 0.5 cm or less into the pancreas; T3b, tumor invades more than 0.5 cm into the pancreas or extends into the peripancreatic tissue or duodenal serosa but without involvement of the celiac axis or the superior mesenteric artery.
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