β£What is Tibia Hemimelia?Longitudinal deficiency of tibia with varying degrees of tibia absenceAD inheritance30% bilateralβ£Associated deformities?UL β ulnar aplasiaLL β PFFD, Polydactyly, Equinovarusβ£Classification of tibia hemimelia?JoneβsType 1 = complete absence of tibia2 = proximal present only3 = distal present only4 = tibia shortened with disastasis of ankle jointβ£What will you assess for clinically?Check for knee ligamentous stability and presence of knee extensor mechanismβ£Mx of tibia hememilia?Dependant on knee stability and extensor mechanismNo knee extension = Disarticulation *thru knee amputationActive knee extension present = Synostosis of fibula to partial tibia +/- symes amputation