Table 2.

Histopathologic description of the study population.

Patient No.	Total Dose (Gy)	Gross Duodenal Appearance	Histology of Duodenal Margin	Other Duodenal Histology	Duodenal Damage Score
1	25	Not described	Congestion	Normal (scanty) mucosa over tumor	1
2	30	Normal	Normal	Unremarkable	1
3	35	Normal	Normal	Duodenum over tumor normal	1
4	35	Normal	Congestion	Focal ulceration at duodenal ampulla	2
5	35	Normal	Normal	Villous mucosal blunting over tumor, lamina propria with scarring, increased eosinophils, reactive epithelium	2
6	35	Normal	Normal	Villous mucosal blunting at ampulla, reactive epithelium, lamina propria scarring, increased eosinophils	2
7	35	Normal	Congestion	Villous mucosal blunting over tumor, reactive epithelial changes, increased eosinophils	2
8	40	Not described	Unspecified	Extensively ulcerated mucosa over tumor	3
9	40	Not described	Not available	Congestion at ampulla	1
10	40	Normal	Congestion	Focal erosion at ampulla, villous blunting, reactive epithelium, increased eosinophils	2
11	40	Distal end mucosal discoloration, otherwise normal	Congestion	Villous mucosal blunting over tumor with focal erosion	2
12	40	Distal 12 cm dusky, otherwise normal	Congestion	Villous mucosal blunting over tumor, reactive epithelial changes. Ampullary villous blunting, reactive epithelial changes, increased eosinophils in lamina propria	2
13	40	Major duodenal papilla edematous, distal duodenum “ischemic”-appearing	Congestion	Villous blunting of major duodenal papilla with focal erosions, reactive epithelium, increased eosinophils, and peptic changes	2

Gy, Gray.