|
|
DUODENAL ULCER |
GASTRIC ULCER |
|
Frequency |
4 |
1 |
|
Age
of onset |
Younger |
Older |
|
Parietal
cell mass |
Increased |
Normal
or decreased |
|
Acid
secretion |
Increased |
Normal
or decreased |
|
Mucosal
defense |
? |
Decreased |
|
Genetic
factors |
type
O, nonsecretors, HLA-B5 |
None |
|
Gastric
emptying |
Rapid |
Delayed |
|
Incidence
of H. pylori |
>90% |
>80% |