Isolated cutaneous cryptococcosis in clinically unsuspected idiopathic CD4 lymphocytopenia.

Idiopathic CD4 lymphocytopenia first defined in 1992 by the U.S. Centers for Disease Control and Prevention, as the repeated presence of a CD4(+) T-lymphocyte count of fewer than 300 cells/cumm or of <20% of total T-cells with no evidence of human immunodeficiency virus (HIV) infection and therapy that might cause depressed CD4 T-cells. Most of the cases present with systemic opportunistic infections. We report a case without risk factors or laboratory evidence of HIV infection, presenting with cutaneous cryptococcal infection, diagnosed on cytology.