Endoscopic Grading of Esophageal Varices
Esophageal varices should be graded using a simplified two-tier system: small varices (<5 mm diameter, minimally elevated above the esophageal mucosa) versus large varices (≥5 mm diameter or occupying >1/3 of the esophageal lumen), as this classification directly guides prophylactic therapy decisions. 1
Standard Two-Grade Classification System
The most widely adopted and clinically relevant grading system divides varices into:
- Small varices: <5 mm in diameter, appearing as minimally elevated veins above the esophageal mucosal surface 1, 2
- Large varices: ≥5 mm in diameter or occupying more than one-third of the esophageal lumen 1, 2
This simplified approach was specifically recommended at a consensus meeting because it directly correlates with treatment decisions and was the classification used in prophylactic trials 1. When centers use a three-grade system (small, medium, large), medium-sized varices should be managed identically to large varices, as they were grouped together in clinical trials 1.
Three-Grade Classification System (When Used)
When institutions employ a three-tier semiquantitative morphological assessment:
- Grade 1 (Small): Minimally elevated veins above the esophageal mucosal surface 1
- Grade 2 (Medium): Tortuous veins occupying less than one-third of the esophageal lumen 1
- Grade 3 (Large): Varices occupying more than one-third of the esophageal lumen 1
Critical caveat: Medium and large varices require the same prophylactic management approach, making the distinction between them less clinically meaningful 1.
Essential Additional Endoscopic Features
Beyond size grading, endoscopists must document:
- Red signs (red wale marks or red spots): Localized reddish mucosal areas or spots on the variceal surface that indicate substantially higher bleeding risk and must be recorded 1, 2
- Active bleeding: Observed hemorrhage from a varix confirms acute variceal bleeding 1, 2
- "White nipple" sign: Overlying a varix, characteristic of recent hemorrhage 1, 2
- Adherent clots: Covering a varix, indicating recent bleeding 1, 2
Gastric Variceal Classification
Gastric varices require separate classification based on location and relationship to esophageal varices:
Gastroesophageal Varices (GOV)
- GOV1: Extension along the lesser gastric curvature; managed identically to esophageal varices 1, 2
- GOV2: Extension along the fundus; longer and more tortuous 1
Isolated Gastric Varices (IGV)
- IGV1: Located in the fundus; tortuous and complex; requires exclusion of splenic vein thrombosis 1, 2
- IGV2: Located in the body, antrum, or around the pylorus 1
Size classification for gastric varices differs: large (≥10 mm), medium (5-10 mm), and small (<5 mm) 1.
Clinical Implications of Grading
Large varices (≥5 mm) carry substantially higher first bleeding risk and mandate primary prophylaxis with non-selective beta-blockers or endoscopic band ligation 1, 2. Small varices require surveillance endoscopy every 1-2 years in compensated cirrhosis, while patients without varices need repeat endoscopy every 2-3 years 1, 2.
Common Pitfalls to Avoid
- Interobserver variability is substantial: Agreement on variceal presence/absence is only 70%, with kappa values averaging 0.38, and this variation is not related to endoscopist experience 3. Documentation of size and red signs is therefore critical for consistent management decisions.
- Do not use outdated four-grade systems: The two-grade classification (small vs. large) provides the most clinically actionable information and aligns with evidence-based treatment thresholds 1.
- Never omit documentation of red signs: Their presence significantly elevates bleeding risk independent of variceal size 1, 2.