Advanced Biomedical Research 2277-9175 2022 october 2022 10 01 Case Report: Spontaneous regression of diffuse large B-cell lymphoma in a patient with ataxia–telangiectasia 1 4 24304 10.4103/abr.abr_169_21 EN Roya Sherkat Acquired Immunodeficiency Research Center, Isfahan University of Medical Sciences 0000-0001-6745-8161 Noushin Afshar Moghaddam Department of Pathology, School of Medicine, Isfahan University of Medical Sciences Nahid Reisi Department of Pediatric Hematology and Oncology, Faculty of Medicine, Child Growth and Development Research Center, Isfahan University of Medical Sciences Isfahan Immunodeficiency Research Center, Seyed Al‑Shohada Hospital, Isfahan University of Medical Sciences Marzieh Rezaei Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran 0000-0003-1871-3861 Journal Article 2021 06 15 Ataxia–telangiectasia (AT) is a type of primary immunodeficiency characterized by an autosomal recessive mode of inheritance and usually presents with progressive cerebellar ataxia in early life. This complex disease is associated with humoral and cellular immune dysfunction and other features including characteristic oculocutaneous telangiectasia and increased predisposition to cancers, particularly lymphoma and leukemia. An 11-year-old Iranian girl presented with primary immunodeficiency and was diagnosed as having AT according to her clinical manifestations and molecular findings. She had a history of two types of non-Hodgkin's lymphoma and showed spontaneous regression of her diffuse large B-cell lymphoma without any specific treatment. Gene mutations and dysfunction in patients with AT result in different manifestations including abnormal development of the thymus, immunodeficiency, increased susceptibility to malignancies, and increased radiosensitivity. No standard treatment is available for these patients. The use of immunotherapeutic strategies in patients with primary immune deficiency disease-associated tumors is potentially important. https://advbiores.mui.ac.ir/article_24304_300968290eea2002367f032ffa8daf61.pdf