Clinical Scorecard: Distribution of Nodal Metastases Across Lymph Node Stations by T-Stage in Gastric Cancer: A Systematic Review

At a Glance

Key Highlights

• Gastric cancer remains the fifth most common cancer worldwide and third leading cause of cancer mortality.
• Lymph node involvement strongly influences recurrence rates (20%-50%) and prognosis in gastric cancer.
• Extent of lymphadenectomy (D1 vs D2) impacts loco-regional recurrence, survival, and surgical morbidity/mortality.

Guideline-Based Recommendations

Diagnosis

• Use AJCC 7th edition for T-stage classification in gastric cancer.
• Classify lymph node stations per Japanese Gastric Cancer Association system.
• Assess nodal metastases prevalence per individual lymph node station by T-stage.

Management

• Perform D1 lymphadenectomy for T1a tumors and well-differentiated, <1.5 cm T1b tumors not meeting endoscopic resection criteria.
• Consider D2 lymphadenectomy for more advanced T-stages to reduce loco-regional recurrence and improve survival.
• Endoscopic resection is feasible for early gastric tumors meeting strict criteria (e.g., T1a, well-differentiated, ≤2 cm, non-ulcerated).

Monitoring & Follow-up

• Monitor for recurrence given high rates post-gastrectomy, especially in patients with lymph node involvement.
• Balance risk of lymph node metastases with surgical morbidity when deciding extent of lymphadenectomy.

Risks

• D2 lymphadenectomy is associated with higher morbidity (43%-46%) and mortality (10%-13%) compared to D1 lymphadenectomy.
• Risk of lymph node metastases increases substantially from T1 (8%-31%) to T2-T4 tumors (45%-90%).

Patient & Prescribing Data

Patients with operable gastric cancer stratified by T-stage

Tailored lymphadenectomy extent based on T-stage and tumor characteristics balances oncologic benefit and surgical risk.

Clinical Best Practices

• Use multidisciplinary approach incorporating tumor biology, stage, and location to guide extent of lymphadenectomy.
• Apply Japanese Gastric Cancer Association lymph node station classification for surgical planning.
• Consider endoscopic resection for early-stage tumors meeting established criteria to avoid unnecessary surgery.
• Perform systematic quality assessment of studies when reviewing evidence to inform clinical decisions.

References

• Japanese Gastric Cancer Association guidelines
• AJCC Cancer Staging Manual, 7th edition
• PRISMA checklist for systematic reviews