Table 3.

Spigelman Staging for Duodenal Adenomatosis

Score*	1	2	3
No. polyps	1–4	5–20	> 20
Size (mm)	1–4	5–10	> 10
Histologic type	Tubular	Tubulovillous	Villous
Dysplasia	Mild	Moderate	Severe

^*Spigelman stage I, score 1–4; stage II, score 5–6; stage III, score 7–8; stage IV, score 9–12.