Contents IntroductionAnatomyBiomechanicsClinical PresentationPathogenesisClassification (Staging)Physical ExaminationImagingConservative TreatmentOperative TreatmentControversyReferencesIntroductionAnatomyBiomechanicsClinical PresentationPathogenesisClassification (Staging)Physical ExaminationImagingConservative TreatmentOperative TreatmentControversyReferences