Table 1.

Spigelman scoring for duodenal and periampullary polyps in familial adenomatous polyposis¹⁵

Polyps, n	1–4	5–20	>20
Polyps, size	1–4 mm	5–10 mm	>10 mm
Histology	Tubular adenoma	Tubulovillous adenoma	Villous adenoma
Dysplasia	Mild	Moderate	Severe
Points	1	2	3