Table 3. Duodenal findings at the first and last endoscopies. Duodenal adenomas distribution according to Spigelman classification.

Spigelman stages	First endoscopy (N=102 patients), N (%)	Last endoscopy (N=49 patients), N (%)
Stage
0	82 (80.4)	29 (59.2)
I	9 (8.8)	6 (12.2)
II	6 (5.9)	7 (14.3)
III	1 (1.0)	5 (10.2)
IV	2 (2.0)	0
Adenocarcinoma	2 (2.0)	2 (4.1)