Herring Classification for Perthe’s Disease

Courtesy: Dr Sally Hobson, Hull Royal Infirmary, Hull, UK

Herring Classification for Perthe’s Disease

Herring Lateral Pillar Classification

Group A: No involvement of the lateral pillar.
Group B: At least 50% of lateral pillar height maintained.
Group C: Less than 50% of lateral pillar height maintained.

To designate borderline groups between B and C the B/C border group was included.

• B/C1: lateral pillar more than 50% width, but < 2 to 3 mm width
• B/C2: lateral pillar more than 50% width, but little ossification
• B/C3: lateral pillar more than 50% width, but depressed relative to central column.