eng Science and Education Publishing American Journal of Medical Sciences and Medicine 2327-6657 2014-09-21 2 5 85 88 10.12691/ajmsm-2-5-1 AJMSM2014251 article Ilhami BERBER drilhamiberber@hotmail.com 1 Mehmet Ali ERKURT 1 Funda YETKIN 2 Irfan KUKU 2 Emin KAYA 2 Emin BODAKCI 3 Mustafa KOROGLU 3 Ilknur NIZAM 3 Department of Hematology, Bone Marrow Transplantation Unit, Faculty of Medicine, Inonu University, Malatya, Turkey Department of Infection Disease, Faculty of Medicine, Inonu University, Malatya, Turkey Department of Internal Medicine, Faculty of Medicine, Inonu University, Malatya, Turkey The BK virus is a member of the polyomavirus family. When the immune system is compromised, as in patients undergoing chemotherapy after hematopoietic stem cell and solid organ transplantation, the virus is reactivated, leading to haemorrhagic cystitis. While the BK virus is one of the most common causes of morbidity and mortality in patients after allogeneic stem cell transplantation, it rarely occurs after autologous stem cell transplantation. The early diagnosis and treatment of viral cystitis may prevent significant morbidity and mortality associated with haemorrhagic cystitis caused by the BK virus. It is not entirely clear how the BK virus affects prognosis in patients undergoing allogeneic and autologous hematopoietic stem cell transplantation. http://pubs.sciepub.com/ajmsm/2/5/1/ajmsm-2-5-1.pdf BK Virus Allogeneic and Autologous Bone Marrow Transplantation