herscovici classification herscovici classification the herscovici classification is a system of categorizing medial malleolus fractures of the distal tibia based on level. classification type description a avulsion fracture of the anterior colliculus involving the superficial deltoid ligament b intermediate fracture c fracture at the level of the plafond (lauge-hansen external rotation-abduction type) d plafond fracture (lauge-hansen supination-adduction type)