A decrease in the number of LEUKOCYTES in a blood sample below the normal range (LEUKOCYTE
COUNT less than 4000).
http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Lng=FR&Expert=33355 France French severe combined immunodeficiency leukopenia rare diseases
--- http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Lng=FR&Expert=178503 2011 France scientific and technical information hypertension, pulmonary leukopenia dursun syndrome communication hypertension, pulmonary syndrome