Case Hypotheses

Trauma to stifle that weakened lateral stifle and patella support leading to luxation. How?

Congenital malalignment of the quadriceps leading to patella luxation. What and How?

Muscle injury leading to scarring and contracture and patella luxation. How?

Bone injury to distal femur which healed crooked and led to weakened lateral support for patella and eventual luxation. How?

Hip abnormality (Femoral neck Fx, Femoral head malformation) leading to malalignment of bone or quadriceps leading to patella luxation. What and How?

Patella fracture leading to abnormal bone healing and displacement. How?

Tumor either weakening support or displacing patella. What & Where?