Prospective study of Helicobacter pylori eradication therapy in stage IE high-grade mucosa-associated lymphoid tissue lymphoma of the stomach
Journal
Journal of Clinical Oncology
Journal Volume
19
Journal Issue
22
Pages
4245-4251
Date Issued
2001
Author(s)
Abstract
Purpose: High-grade mucosa-associated lymphoid tissue (MALT) lymphomas of the stomach are generally believed to be Helicobacter pylori-independent, autonomously growing tumors. However, anecdotal cases of regression of high-grade lymphomas after the cure of H pylori infection had been described. The present prospective study was conducted to evaluate the effect of anti-H pylori therapy in stage IE high-grade gastric MALT lymphomas. Patients and Methods: Sixteen patients with H pylori infection and stage IE gastric high-grade MALT lymphoma consented to a brief antibiotic therapy as first line treatment from June 1995 through April 2000. Then, patients underwent intensive endoscopic follow-up examinations (± endoscopic ultrasonography) with biopsy to evaluate tumor response. Patients with significant improvement of gross lesions that accompanied regression of large cells were followed up without additional treatment. Patients without significant improvement were immediately referred to systemic chemotherapy. Results: Eradication of H pylori was achieved in 15 patients and was accompanied by rapid gross tumor regression and disappearance of large cells in 10. All 10 of these patients with early response had subsequent complete histologic remission of lymphoma. The complete remission rate was 62.5% (95% confidence interval, 35.8% to 89.1%). The response rate was not affected by the tumor grading (proportion of large blast cells within the tumor) but was adversely affected by the depth of tumor invasion. At a median follow-up of 43.5 months (range, 21.1 to 67.4 months), all 10 of these patients remained lymphoma-free. The median duration of complete response was 31.2 months (range, 14.4 to 49.1 months). Conclusion: These results suggest that high-grade transformation is not necessarily associated with the loss of H pylori dependence in early-stage MALT lymphomas of the stomach. ?2001 by American Society of Clinical Oncology.
SDGs
Other Subjects
amoxicillin; antibiotic agent; cyclophosphamide; doxorubicin; metronidazole; omeprazole; prednisone; vincristine; adult; aged; article; biopsy; bone marrow suppression; cancer grading; cancer invasion; cancer regression; cancer staging; clinical article; endoscopic surgery; eradication therapy; female; Gram negative infection; Helicobacter pylori; histopathology; human; male; malignant transformation; mucosa associated lymphoid tissue lymphoma; mucosa inflammation; priority journal; stomach lymphoma; tumor growth
Publisher
Lippincott Williams and Wilkins
Type
journal article