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Table 2a Spigelman Staging [33] of Duodenal Polyposis

From: In the Beginning There Was Colectomy: Current Surgical Options in Familial Adenomatous 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