In a post polio case, iliotibial tract contracture is most likely to result in which of the following?

Iliotibial tract is attached posteriorly and laterally to the axis of the knee joint, its contracture cause flexion of the knee, external rotation and posterior subluxation of tibia. Thus iliotibial contracture can cause flexion deformity of the knee, valgus of the knee, external rotation and posterior subluxation of tibia. Ref: Textbook of Ohopedics and Trauma By GS Kulkarni, Volume 1, 2nd Edition, Pages 567-8 ; Ohopaedics for The Physical Therapist Assistant By Mark Dutton, Page 520