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Table 1 The Fanelli and Larson classification: classification of damage in posterolateral structures

From: An isolated Posterolateral corner injury with rotational instability and hypermobile lateral meniscus: a novel entity

Classification Scale of damage Damaged structure
Type A 10° increase in external rotation of the tibia PFL, popliteus tendon
Type B 10° increase in external rotation of the tibia PFL, popliteus tendon
Slight varus relaxation (5–10 mm increase in varus load test) LCL
Type C 10° increase in external rotation of the tibia PFL, popliteus tendon
Slight varus relaxation (> 10 mm increase in varus load test) LCL, capsule avalusion, cruciate ligament
  1. PFL popliteofibular ligament, LCL lateral collateral ligament