[WHIM syndrome: a case report and literature review]

To study the clinical and laboratory characteristics of cases with warts, hypogammaglobulinemia, infections and myelokathexis (WHIM) syndrome.

An 11-year-old boy was diagnosed as WHIM syndrome and CXCR4 gene mutation analysis was performed.

Since 3 years of age, the patient had recurrent fever and persistent cough. Since 6 years of age, he had warts on his fingers, the warts increased gradually. His complete blood count showed: white blood cell (WBC) 0.65×10(9)/L, neutrophil 0.15×10(9)/L, hemoglobin 116 g/L, platelet 200×10(9)/L, reticulocyte 0.62%. Results of serum biochemical tests: total protein (TP) 72.2 g/L (reference value 60 - 80 g/L), albumin 20.4 g/L (reference value 20 - 35 g/L), gammaglobulin 20.4 g/L (reference value 20 - 35 g/L). IgG 5.56 g/L (reference value 7.51 - 15.6 g/L), IgA 0.48 g/L (reference value 0.82 - 4.53 g/L), IgM 0.29 g/L (reference value 0.46 - 3.04 g/L). Peripheral blood lymphocyte subsets: CD3(+)T lymphocyte 43.6% (reference value 64.01% - 75.95%), CD19(+)B lymphocyte 1.00% (reference value 9.02% - 14.1%). Bone marrow smears showed that many of the neutrophils had a reactive appearance, with cytoplasmic vacuolation. Most neutrophils had hypersegmentation with four or five nuclear lobules. In some cells, the filaments connecting the nuclear lobes were long. CXCR4 mutation was detected.

WHIM syndrome is a rare immunodeficiency disorder with an autosomal-dominant pattern of inheritance. The disease is less progressive, and may accompany the patients' whole life.