Primary gastric lymphoma: a clinicopathological study.

Area of Science:

• Gastroenterology
• Oncology
• Surgical Pathology

Background:

• Primary gastric lymphoma is a rare malignancy.
• Treatment strategies and prognostic factors require further elucidation.

Purpose of the Study:

• To investigate treatment-related issues and prognostic factors in primary gastric lymphoma.
• To correlate clinicopathological features with patient outcomes.

Main Methods:

• Retrospective analysis of 25 patients with primary gastric lymphoma.
• Evaluation of treatment modalities including surgical dissection (D2, D3, D4) and chemotherapy.
• Correlation of Working Formulation (WF) classification, lymph node metastasis, and tumor invasion depth with survival rates.

Main Results:

• Low-grade and intermediate-grade gastric lymphomas showed better 5-year survival than high-grade types.
• Absence of lymph node metastasis or involvement of perigastric lymph nodes correlated with improved survival.
• Tumors invading only the submucosal layer treated with D2 dissection without adjuvant chemotherapy showed no recurrence.
• Advanced invasion (muscularis propria/serosa) or distant lymph node metastasis necessitated D3/D4 dissection with postoperative chemotherapy or preoperative chemotherapy, respectively.

Conclusions:

• Gastric lymphoma invading the submucosal layer requires gastrectomy with D2 lymph node dissection; adjuvant chemotherapy is not essential.
• Perigastric lymph node metastasis or invasion into muscularis propria/serosa warrants D3/D4 dissection and postoperative chemotherapy.
• Distant lymph node metastasis, adjacent structure invasion, or high-grade histology (WF) indicates a need for preoperative chemotherapy.