title: Etiological causes of pancytopenia: A report of 137 cases.
abstract: OBJECTIVE
  The aim of this study is to evaluate the etiological causes of pancytopenia in patients who were admitted to the hematology ward due to pancytopenia.
  
  
  METHODS
  All patients who were admitted to the hematology ward of Ministry of Health Istanbul Training and Research Hospital due to pancytopenia between 2013 and 2015 were retrospectively evaluated regarding etiological causes.
  
  
  RESULTS
  A total of 137 patients was evaluated. The etiological causes of pancytopenia were recorded as Vitamin B12 deficiency (n: 24; 17%), chronic liver disease (n: 21; 15%), malignancy (n: 19; 13%), myelodysplastic syndrome (n: 18; 13%), aplastic anemia (n: 11; 8%), rheumatic diseases (n: 7; 5%), and endocrine causes (n: 3; 2%).
  
  
  CONCLUSIONS
  The etiological causes of pancytopenia vary depends on patients' age, gender, country, and other conditions. Vitamin B12 deficiency is the most common treatable cause of pancytopenia. Most of the etiological causes could be diagnosed with laboratory analysis and radiological imagings, without the need of a bone marrow examination.
authors.affiliation: Department of Hematology, Ministry of Health, Istanbul Training and Research Hospital, Istanbul, Turkey.
authors.forename: Osman
authors.initials: O
authors.lastname: Yokuş
authors.affiliation: Department of Infectious Diseases and Clinical Microbiology, Ministry of Health, Bakirkoy Dr. Sadi Konuk Training and Research Hospital, Istanbul, Turkey.
authors.forename: Habip
authors.initials: H
authors.lastname: Gedik
keywords: Chronic liver disease; Vitamin B12 deficiency; myelodysplastic syndrome; pancytopenia