Lymphoma occurring in the post-operative stomach would appear to be ve
ry rare with only five previously recorded cases. In three of these, f
ocal lymphoid hyperplasia or pseudolymphoma had been found at the time
of the original ulcer surgery, or at subsequent biopsies of the gastr
ic stump or anastomotic sites. These latter three cases developed lymp
homa within 11 years of the ulcer surgery as against the 20 years or l
onger generally found in cases of gastric stump carcinoma. Two cases p
resenting with gastric stump lymphoma approximately 20 years after Bil
lroth 2 partial gastrectomy are reported. In neither of these two case
s, nor in the other two patients previously recorded with post-operati
ve gastric lymphoma 20 or more years following gastric surgery, was lu
minal focal lymphoid hyperplasia reported at the time of the original
gastric surgery. It is postulated that these two small groups may have
developed lymphoma due to differing malignant stimuli.