PatellaChondromalacia PatellaePatellar LigamentCartilage DiseasesPatellofemoral JointPatellar DislocationKnee JointNail-Patella SyndromeCartilage, ArticularDislocationsKnee ProsthesisArthroplasty, Replacement, KneeProchloronOsteoarthritis, KneeJoint InstabilityFemurRange of Motion, ArticularArthralgiaTibiaPatellofemoral Pain SyndromeOsteochondritisKnee InjuriesQuadriceps MuscleBone WiresJoint DiseasesKneeMagnetic Resonance ImagingMolluscaBiomechanical PhenomenaAnatomic LandmarksLeadTreatment OutcomeTendonsSymptom AssessmentCadaverFollow-Up StudiesBone MalalignmentDepressionArthroscopyPainBone Diseases, Developmental