Title: A 19-year-old male with Truncus arteriosus type I : A rare case report from Syria.ABDULKADER BITARa ,Mouhammed Sleiaya,+, M-JABER KOJAKb , MOLHAM HOMSIa, Abdullah Alomara , OBADA AL TAWEKJIa, AHMAD ABDUL HAKIM ALHAMIDc, Saleh Takkemd.a Faculty of Medicine, Hama University, Hama, Syrian Arab Republic.b Faculty of Medicine, Internal medicine Department, Damascus university, Damascus , Syrian Arab Republic.c Faculty of Medicine, Al Hawash Private University, Damascus , Syrian Arab Republic.d Faculty of Medicine,Cardiology Department, Damascus University, Damascus, Syria*Corresponding author: Mouhammed Sleiay, Faculty of Medicine, Hama University, Hama, Syrian Arab Republic. email: abdmouh1234mouhmouh@gmail.com+ ABDULKADER BITARa ,Mouhammed Sleiaya,+, M-JABER KOJAKb , MOLHAM HOMSIa, Abdullah Alomara , OBADA AL TAWEKJIa, AHMAD ABDUL HAKIM ALHAMIDc, Saleh Takkemd are co-first authors. All contributed equally in this paper.Emails & ORCID:ABDULKADER BITAR:ibrahimabd751@gmail.comMouhammed Sleiay:abdmouh1234mouhmouh@gmail.comORCID: 0009-0003-8887-0739M-JABER KOJAK:mjkojak2000@gmail.comMOLHAM HOMSI:molhamhomsi901@gmail.comAbdullah Alomar:abdullahaloumar10@gmail.comOBADA AL TAWEKJI:altawekjy@gmail.comAHMAD ABDUL HAKIM ALHAMID:alhamidahmad933@gmail.comSaleh Takkem:drsalehtakkem35@gmail.com