Background:　The　study　is　aimed　to　observe　the　range　of　variation　of　the　ACL　PLB　femoral　footprint　and　investigate　countermeasures　for　accurate　femoral　bone　tunnel　placement　during　double-bundle　ACL　reconstruction.　Methods:　The　femoral　insertions　of　the　anteromedial　bundle　(AMB)　and　PLB　of　the　ACL　were　dissected　in　30　male　cadaveric　knees.　The　ACL　footprint　on　the　lateral　intercondylar　wall　(LOW)　was　observed,　and　the　shape　of　the　LIW,　the　resident　ridge,　the　angle　between　the　ACL　long　axis　and　femoral　axis　(AA),　and　the　vertical　distance　from　the　center　of　the　PLB　to　the　lowest　cartilage　border　of　the　LIW　(PD)　were　measured.　Results:　The　area　most　populated　by　the　ACL　fibers　was　directly　under　the　resident　ridge.　AA　=　18.7　degrees　+/-　15.25　degrees　with　variation　from　-18　degrees　to　56　degrees,　and　PD　=　7.02　+/-　1.47　mm　with　variation　from　3.75　to　11.08　mm.　Both　discrete　values　were　very　large　in　both　groups　of　data.　There　were　two　kinds　of　LIW:　trapezoidal.(8　knees)　and　triangular　(21　knees).　Both　AA　and　PD　values　exhibited　significant　differences　between　the　two　types　of　LIWs　(P　=　0.00).　Conclusion:　AA　and　PD　vary　among　individuals.　The　insertions　and　centers　of　the　PLB　cannot　be　exactly　anatomically　determined　with　one　size.　For　double-bundle　ACL　reconstruction,　an　individualized　intraoperative　footprint　observation　for　fresh　cases　with　footprint　remnants,　or　resident　ridge　and　anteromedial　bundle-interval　identification　for　old　ACL　tears,　can　be　reasonable　methods　for　posterolateral　tunnel　orientation.　Clinical　relevance:　Clinical　relevance　is　observe　the　range　of　variation　of　the　PLB　femoral　footprint　for　clinical　double-bundle　ACL　reconstruction.　(C)　2014　Elsevier　B.V.　All　rights　reserved.