简介：Objective:Toprovidedetailedinformationofcoronamortisforilioinguinalapproachasananteriorapproachtotheacetabulumandpelvis.Methods:Thecourse,branchesanddistributionofthevascularconnectionbetweentheobturatorsystemandtheexternaliliacorinferiorepigastricsystemslocatedoverthesuperiorpubicramuswereobservedon50hemipelviseswithintactsofttissues.Results:Duringthedissections,72%ofthecadavericsideshadatleastonecommunicatingvesselbetweentheobturatorsystemandtheexternaliliacorinferiorepigastricsystemsonthesuperiorpubicramus.Theaveragediameteroftheconnectingvesselwas2.6mm(range,2.0-4.2mm).Itcoursedoverthesuperiorpubicramusoriliopubiceminenceverticallytoentertheobturatorforamenandexitthepelvis.Theaveragedistancefrompubicsymphysistothevascularconnectionsbetweentheobturatorandexternaliliacsystemswas52mm(range,38-68mm).Conclusions:Vascularconnectionsbetweentheobturatorsystemandtheexternaliliacorinferiorepigastricsystemswerefoundoverthesuperiorpubicramuswithahighincidence.Theyarepronetodamageduringtheilioinguinalapproachasananteriorapproachtotheacetabulumandpelvis.Thus,coronamortislocatedoverthesuperiorpubicramusdeservesgreatattentionduringtheilioinguinalapproach.