Table 2 Diagnostic concordance of pathological subtype and grade between endoscopic biopsy specimens and resected specimens (n = 22).

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

Pathological subtype

Endoscopic biopsy specimens

Resected specimens

I-type (n = 15)

M&PB-type (n = 7)

I-type (n = 13)

13

0

M&PB-type (n = 9)

2

7

κ = 0.805 (95% CI, 0.55–1.06), P < 0.001

CI, confidence interval, I-type, intestinal type; M&PB-type, mixed and pancreatobiliary type

Pathological grade

Endoscopic biopsy specimens

Resected specimens

tub1 (n = 15)

tub2 or por (n = 7)

tub1* (n = 18)

15

3

tub2 or por (n = 4)

0

4

κ = 0.645 (95% CI, 0.30–0.99), P = 0.001

CI, confidence interval; tub1, well differentiated; tub2, moderately differentiated; por, poorly differentiated; tub1* includes high-grade adenoma