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J Orthop Traumatol. 2016 Dec;17(4):303-308. Epub 2016 Feb 9.

The anterolateral ligament of the knee: unwrapping the enigma. Anatomical study and comparison to previous reports.

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Princess Elizabeth Orthopaedic Centre, Royal Devon and Exeter Hospital, Barrack Road, Exeter, Devon, EX2 5DW, UK.
Leeds Teaching Hospitals, Leeds, UK.
Princess Elizabeth Orthopaedic Centre, Royal Devon and Exeter Hospital, Barrack Road, Exeter, Devon, EX2 5DW, UK.



It has been suggested that the anterolateral ligament (ALL) of the knee may have importance in limiting rotational instability, and reconstruction may prevent a continued pivot-shift following anterior cruciate ligament surgery. However, the anatomy of this ligament has not been consistently reported in recent publications. We describe our experience of cadaveric dissection with reference to other published work.


Eleven fresh-frozen cadaveric knees were dissected using a standard technique. The ALL tissue was identified with internal rotation of the tibia and varus stress. Measurements were made using a digital caliper and details of the origin and insertion were recorded.


The ALL was identified in ten of the 11 cadavers. The only specimen in which it was not identified was found to also have an anterior cruciate ligament deficiency. The mean dimensions were: length 40.1 (± 5.53) mm, width 4.63 (± 1.39) mm, thickness 0.87 (± 0.18) mm. The femoral origin was posterior and proximal to the lateral collateral ligament attachment in six knees, anterior and distal in three knees, and at the same site in one knee. The tibial insertion was a mean 17.7 (± 2.95) mm from Gerdy's tubercle (GT) and 12.3 (± 3.55) mm from the fibula head (FH). This was 59.5 (± 5.44) % from GT to FH.


This anatomical data adds to previous information about the ALL. Our results support the finding that the ALL is a capsular thickening with meniscal attachment. The findings will help to guide the further work required to define the indications for reconstruction and appropriate grafts.


Anterior cruciate ligament reconstruction; Anterolateral ligament; Knee anatomy; Knee stability

[Indexed for MEDLINE]
Free PMC Article

Conflict of interest statement

Compliance with ethical standards Ethical standard statement This work did not involve any patients or live-animal subjects. Therefore, Ethical Board Committee approval was not required. The dissection and use of cadaveric specimens was done in accordance with the Human Tissue Act 2004. Conflict of interest The authors have no conflict of interest to disclose.

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