Title: Spontaneous Regression of Angioimmunoblastic T-cell lymphoma in a Pediatric Patient with Ataxia-Telangiectasia: A case report and review of literature Dima Ablaa, Abeer Al-Battashib , Khalil Al Bayrotia, Khuloud Abu Qasidac, Nasser Al-Rahbica Pediatric Hematology and oncology Specialist, Department of Pediatric Hematology and Oncology, The National Oncology Centre, The Royal Hospital, Muscat, Sultanate of Oman.b Pediatric Hematology and oncology Consultant, Department of Pediatric Hematology and Oncology, The National Oncology Centre, The Royal Hospital, Muscat, Sultanate of Oman.c Department of Pathology, The Royal Hospital, Muscat, Sultanate of Oman. Corresponding author: Abeer Al-Battashi The Royal Hospital, Muscat, Sultanate of Oman PO Box 1191, PC 133 +968 97228888 Word count: Abstract; 68 words, Main text:1047 words. The number of Tables, Figures, and Supporting Information files: 1 Figure, 2 Tables A short running title: Angioimmunoblastic T-cell lymphoma in Ataxia-Talengiectasia Keywords: Angioimmunoblastic T cell lymphoma, spontaneous regression, pediatric patient. Abbreviations