A rare case of endescopic and histological regression of a gastric lymphoid mucosal lesion after eradication ofHelicobacter pylori is reported. A 72-year-old man was suspected of having a low-grade B-cell gastric mucosa-associated lymphoid tissue (MALT) lymphoma by endoscopic and histological findings. Histology of biopsy specimens showed massive infiltration of atypical lymphocytes and lymphoepithelial lesions. Immunohistochemical staining revealed kappa light chain expression in the infiltrated atypical lymphocytes to be twofold that of lambda light chain. The above diagnosis was thus highly suspected but not confirmed. Antibiotic therapy was given on the basis of evidence ofH. pylori infection. Successful eradication ofH. pylori resulted in remarkable improvement of endoscopic and histological findings. Follow-up studies were carried out 8 months after eradication, with no evidence of relapse. The eradication ofH. pylori appears to be an effective alternative therapy for B-cell lymphoproliferative disease, although longer follow-up and further studies are needed before this treatment can be establisted.
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Tanahashi, T., Tatsumi, Y., Sawai, N. et al. Regression of atypical lymphoid hyperplasia after eradication ofHelicobacter pylori . J Gastroenterol 32, 543–547 (1997). https://doi.org/10.1007/BF02934097
- Helicobacter pylori
- atypical lymphoid hyperplasia
- primary gastric MALT lymphoma