[Cryptococcal meningo-encephalitis in an apparently immunocompetent patient]. / Cryptococcose neuroméningée chez un sujet en apparence immunocompétent.

INTRODUCTION: Cryptococcal meningo-encephalitis is a rare disease occurring more frequently in immunocompromised hosts. CASE REPORT: We report the case of an apparently immunocompetent patient who developed a recurrent neurological deficit with lymphocytic meningitis. The time from the first symptoms to diagnosis was 8 months. We noted mild CD4+ lymphocytopenia (500 cells/mm3) without HIV infection. CD4+ lymphocytes were not reactive for a panel of antigens. CONCLUSION: This case illustrates the usefulness of cerebrospinal fluid Cryptococcus Neoformans antigen test in patients with an unexplained neurological syndrome with a lymphocytic meningitis together with quantification of circulating lymphocytes clusters and analyse of their function in opportunistic infections.