title: A review of the anterolateral ligament of the knee: current knowledge regarding its incidence, anatomy, biomechanics, and surgical dissection.
abstract: OBJECTIVE
  To systematically review current literature on the anterolateral ligament (ALL) of the knee.
  
  
  METHODS
  We searched the PubMed/Medline database for publications specifically addressing the ALL. We excluded studies not written in English, studies not using human cadavers or subjects, and studies not specifically addressing the ALL. Data extraction related to the incidence, anatomy, morphometry, biomechanics, and histology of the ALL and its relation to the Segond fracture was performed.
  
  
  RESULTS
  The incidence of the ALL ranged from 83% to 100%, and this range occurs because of small discrepancies in the definition of the ALL's bony insertions. The ALL originates anterior and distal to the femoral attachment of the lateral collateral ligament. It spans the joint in an oblique fashion and inserts between the fibular head and Gerdy tubercle on the tibia. Exact anatomic and morphometric descriptions vary in the literature, and there are discrepancies regarding the ALL's attachment to the capsule and lateral meniscus. The ALL is a contributor to tibial internal rotation stability, and histologically, it exhibits parallel, crimped fibers consistent with a ligamentous microstructure. The footprint of the ALL has been shown to be at the exact location of the Segond fracture.
  
  
  CONCLUSIONS
  The ALL is a distinct ligamentous structure at the anterolateral aspect of the knee, and it is likely involved in tibial internal rotation stability and the Segond fracture.
  
  
  METHODS
  Level IV, systematic review of anatomic and imaging studies.
authors.affiliation: Department of Orthopaedic Surgery, Beaumont Health System, Royal Oak, Michigan, U.S.A.
authors.forename: Ryan
authors.initials: R
authors.lastname: Pomajzl
authors.affiliation: Orthopaedic Research Laboratories, Beaumont Health System, Royal Oak, Michigan, U.S.A.. Electronic address: Tristan.Maerz@beaumont.edu.
authors.forename: Tristan
authors.initials: T
authors.lastname: Maerz
authors.affiliation: Orthopaedic Research Laboratories, Beaumont Health System, Royal Oak, Michigan, U.S.A.
authors.forename: Christienne
authors.initials: C
authors.lastname: Shams
authors.affiliation: Department of Orthopaedic Surgery, Beaumont Health System, Royal Oak, Michigan, U.S.A.
authors.forename: Joseph
authors.initials: J
authors.lastname: Guettler
authors.affiliation: Department of Orthopaedic Surgery, Beaumont Health System, Royal Oak, Michigan, U.S.A.
authors.forename: James
authors.initials: J
authors.lastname: Bicos
mesh_terms: D002102:Cadaver; D004210:Dissection; D005269:Femur / Q000033:anatomy & histology; D006801:Humans; D015994:Incidence; D007717:Knee / Q000033:anatomy & histology* / Q000502:physiology / Q000601:surgery; D007719:Knee Joint / Q000033:anatomy & histology* / Q000502:physiology / Q000601:surgery; D008023:Ligaments, Articular / Q000033:anatomy & histology* / Q000502:physiology* / Q000601:surgery; D012399:Rotation; D013977:Tibia / Q000033:anatomy & histology