For large gastric fundal varices, should endoscopic cyanoacrylate glue or coil embolization be used as the first‑line treatment?

Endoscopic Cyanoacrylate Glue Injection is the Recommended First-Line Treatment for Large Gastric Fundal Varices

For large gastric fundal varices, endoscopic cyanoacrylate injection (ECI) should be considered the only definitive endoscopic therapy, with EUS-guided coil plus cyanoacrylate representing an enhanced approach when EUS expertise is available 1.

Treatment Algorithm

Standard Approach: Direct Endoscopic Cyanoacrylate Injection

• Cyanoacrylate glue injection remains the most widely utilized and guideline-recommended modality for cardiofundal gastric varices 1, 2
• Use 4-carbon (butyl) preparations of cyanoacrylate, which polymerize faster than 8-carbon (octyl) preparations and minimize embolization risk 1
• Do not add plant-based oils (like lipiodol) to cyanoacrylate, as this increases distal embolization risk without providing necessary benefit 1
• Embolization rates with proper technique are extremely low (0.7% in the largest series), and clinically significant events are rare 1

Enhanced Approach: EUS-Guided Coil Plus Cyanoacrylate (When Available)

If EUS expertise and equipment are available, EUS-guided coil embolization with cyanoacrylate injection provides superior outcomes 2:

• Achieves higher obliteration rates (95.8-100% vs 64.8-92.3% with glue alone) 3, 4
• Requires significantly less glue volume (median 1.5 mL vs 2.5 mL) 3
• Reduces rebleeding and need for reintervention (20.8% vs 53.8% reintervention rate) 4
• Improves survival compared to cyanoacrylate alone 4
• Place 1-3 coils (typically Nester or MReye embolization coils) followed by cyanoacrylate injection 2
• Use Doppler interrogation to confirm obliteration in real-time 2

Important Caveats and Pitfalls

When to Use Band Ligation Instead

Lesser curve gastric varices (which extend from esophageal varices) respond well to band ligation and should be treated similarly to esophageal varices 1. The large size and mass-like configuration of cardiofundal varices makes band ligation technically difficult and physiologically inferior 1.

Safety Considerations

• ECI should only be performed by specifically trained endoscopists with experienced interventional radiologists available for complications 1
• While EUS-guided coil plus cyanoacrylate has more frequent adverse events (25.4% vs 8.5%), these are generally mild and managed conservatively 3
• The feared complication of glue embolization leading to pulmonary embolus or stroke is extremely rare with proper technique 1
• Portal vein thrombosis and varix size ≥18 mm predict incomplete obliteration with glue alone, favoring the EUS-guided coil approach in these cases 3

Technical Execution

• Inject glue immediately after needle insertion to avoid exacerbating bleeding 1
• Ensure steady, uniform injection delivery 1
• For EUS-guided approach: use 19-gauge or 22-gauge FNA needle, instill 100-200 mL water in gastric fundus for better visualization, and target until Doppler flow is significantly reduced or absent 2

Evidence Strength

The 2021 and 2023 AGA Clinical Practice Updates 1, 2 provide the strongest guideline-level evidence supporting cyanoacrylate as first-line therapy. Recent high-quality research from 2025-2026 3, 4 demonstrates clear superiority of the combined coil-plus-cyanoacrylate approach when EUS expertise exists, with randomized controlled trial data showing improved obliteration, reduced reintervention, and better survival 4.