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. 2004 Nov 15;2(4):153–160. doi: 10.1186/1897-4287-2-4-153

Table 2a.

Spigelman Staging [33] of Duodenal Polyposis

Points assigned

Characteristic 1 2 3
No. of polyps 1 to 4 5 to 20 >20
Polyp size (mm) 1 to 4 5 to 10 >10
Histology tubular tubulovillous villous
Dysplasia mild moderate severe

Scoring system:
 Stage 0 = 0 points
 Stage I = 1 to 4 points
 Stage II = 5 to 6 points
 Stage III = 7 to 8 points
 Stage IV = 9 to 12 points