Hi,
clinical features:
1- pain around the knee joint referred down through the shin to the ankle
2- osteophytic nipping may be palpable
3- muscle spasm in the hamstrings
4- patellofemoral crepitus
5- flexion deformity
6- joint enlargement
7- quadriceps atrophy ( vastus medialis)
8- collateral ligaments become too long due to the loss of joint space
9- becouse of #8 they loss the control of varus and valgus movements.