Tehran University of Medical Sciences Iranian Journal of Allergy, Asthma and Immunology 1735-1502 5 1 2006 03 15 39 40 Seyed Hesamedin Nabavizadeh Mehran Karimi Reza Amin 2015 10 01 Polyclonal anti-thymocyte globulin (ATG) is used as an immunosuppressive agent in the treatment of aplastic anemia (AA). Serum sickness is a recognized side effect of ATG. We observed abnormal skin manifestation in patient with aplastic anemia who had been treated with ATG. We conclude that abnormal immune function caused by aplastic anemia and ATG and corticosteroids may aggravate the signs of serum sickness. https://ijaai.tums.ac.ir/index.php/ijaai/article/view/132 https://ijaai.tums.ac.ir/index.php/ijaai/article/download/132/132