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: [email protected]+ 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:[email protected] Sleiay:[email protected]: 0009-0003-8887-0739M-JABER KOJAK:[email protected] HOMSI:[email protected] Alomar:[email protected] AL TAWEKJI:[email protected] ABDUL HAKIM ALHAMID:[email protected] Takkem:[email protected]