EHS Classification of Right Subcostal Incisional Hernia
To write the EHS classification for a right subcostal incisional hernia, document it as: "Lateral incisional hernia, subcostal, [width in cm]" - specifying the exact transverse width measurement of the fascial defect.
Understanding the EHS Classification System
The European Hernia Society classification distinguishes hernias primarily by location and size as the major risk factors for outcomes 1. For incisional hernias specifically, the system separates them into:
- Midline hernias (M1-M4 based on location along the midline)
- Lateral hernias (L1-L4 based on anatomical region)
Classification Components for Your Case
Location Designation
A right subcostal hernia falls under the lateral hernia category 1. Specifically:
- Lateral (L) designation applies to all non-midline incisional hernias
- Subcostal location should be explicitly stated as it represents the L1 subcostal region
Size Measurement
Measure and document the transverse width of the fascial defect in centimeters 2, 3. This is critical because:
- Width classification independently predicts postoperative complications 2
- Hernias spanning multiple EHS categories have significantly higher surgical site occurrence rates (74% vs 39% for single-category hernias) 3
- Larger width correlates with adverse events on multivariable analysis 4
Additional Descriptors to Include
Document these clinically relevant factors:
- Recurrence status: Primary vs recurrent (if recurrent, specify which recurrence: first, second, third, etc.)
- Presence of incarceration or strangulation (if presenting emergently)
- Contamination status: Clean, clean-contaminated, contaminated, or dirty field 5
Practical Documentation Format
Write it as: "Right subcostal lateral incisional hernia (EHS: L1, [X] cm width), [primary/recurrent], [reducible/incarcerated]"
Example: "Right subcostal lateral incisional hernia (EHS: L1, 8 cm width), primary, reducible"
Clinical Significance
The lateral designation matters because lateral hernias have significantly lower surgical site occurrence rates (23%) compared to hernias with both midline and lateral components (74%) 3. This classification directly impacts:
- Surgical planning and mesh selection
- Risk stratification for complications
- Comparison across studies and registries 1
Common pitfall: Failing to measure the exact width leads to inadequate risk stratification. The width measurement is not optional - it's an independent predictor of complications and must be documented 2.