Are antibiotics the treatment of choice for gastric lymphoma?
There is compelling evidence supporting the link between Helicobacter pylori infection and gastric mucosa-associated lymphoid tissue (MALT) lymphoma, and it seems undeniable that eradication of H. pylori with antibiotics can be effectively used as the sole initial treatment of localized (ie, confined to the gastric wall) gastric MALT lymphoma. This treatment is the best studied therapeutic approach, with more than 20 reported studies confirming that histologic regression of the lymphoma can be achieved in most cases. However, antibiotic treatments seem to suppress but not eradicate the neoplastic clone, and MALT lymphoma relapses have been seen years after treatment. Molecular follow-up studies revealed the persistence of the malignant clone in more than 50% of the cases in histologic remission after antibiotic therapy. The clinical significance of this finding is still unclear. Transient and self-limiting histologic and molecular relapses can also occur. Therefore, a careful long-term follow-up is mandatory for all of the patients who received antibiotic treatment.
Zucca
Emanuele
E
Department of Medical Oncology, Oncology Institute of Southern Switzerland, Ospedale San Giovanni, Bellinzona, Switzerland. emanuelezucca@yahoo.com
Cavalli
Franco
F
D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D002880:Chromosomes, Human, Pair 11 / Q000648:ultrastructure; D002887:Chromosomes, Human, Pair 18 / Q000648:ultrastructure; D002986:Clinical Trials as Topic; D002999:Clone Cells / Q000473:pathology; D018450:Disease Progression; D005500:Follow-Up Studies; D005756:Gastritis / Q000150:complications / Q000382:microbiology; D016481:Helicobacter Infections / Q000150:complications / Q000188:drug therapy*; D016480:Helicobacter pylori / Q000187:drug effects* / Q000302:isolation & purification; D006801:Humans; D018442:Lymphoma, B-Cell, Marginal Zone / Q000188:drug therapy* / Q000209:etiology / Q000235:genetics / Q000473:pathology; D016403:Lymphoma, Large B-Cell, Diffuse / Q000188:drug therapy / Q000209:etiology; D009364:Neoplasm Recurrence, Local; D018365:Neoplasm, Residual; D014411:Neoplastic Stem Cells / Q000473:pathology; D016879:Salvage Therapy; D013274:Stomach Neoplasms / Q000188:drug therapy* / Q000209:etiology / Q000235:genetics / Q000473:pathology; D014178:Translocation, Genetic
D000900:Anti-Bacterial Agents