Clinical and Vaccine Immunology, January 2009, p. 142-145, Vol. 16, No. 1
1071-412X/09/$08.00+0 doi:10.1128/CVI.00358-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.
| CASE REPORT |

Inmunology,1 Pediatric Oncology,3 Pathology Services, Hospital Universitario Virgen de la Arrixaca, Murcia, Spain,4 Molecular Genetics, Hospital Universitario Son Dureta, Palma de Mallorca, Spain,2 Inmunology Service, Hospital Gregorio Marañón, Madrid, Spain,5 Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (Ciberehd), Spain6
Received 30 September 2008/ Returned for modification 7 November 2008/ Accepted 13 November 2008
We report the first case of hemophagocytic lymphohistiocytosis (HLH) induced by the monoclonal expansion of Epstein-Barr virus (EBV)-negative NK cells. Consanguinity of the patient's parents made it necessary to discard familial HLH in the patient and her sister with identical HLA markers and demonstrate that no cause other than the expansion of NK cells, which secrete high levels of gamma interferon, was inducing HLH in this patient.
Published ahead of print on 19 November 2008.
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