tests of vitamin b ( 12 ) absorption in three patients gave normal results , no gastric autoantibodies were detected in the two patients tested , in all patients histological examination of the gastrectomy specimens revealed a multifocal gastritis differing from the diffuse gastritis of pernicious anaemia and in three patients the gastritis affected the antrum , which is unusual in pernicious anaemia .
C0042845
vitamin b ( 12
C0002892
pernicious anaemia