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[Clinical Picture] DOCK8 primary immunodeficiency syndrome

A 3-year-old boy presented to our dermatology department in July, 2013, with a history of moderate atopic dermatitis, food allergy to cow’s milk protein and hen’s egg, and a 4 week history of very extensive molluscum contagiosum. Initial treatment with topical cantharidin and imiquimod had been unsuccessful. The family had no history of immunodeficiency. Investigations showed lymphopenia with abnormal T-cell subsets (CD4 lymphocyte count of 0·384 × 109 cells per L [normal range 0·5–2·4 × 109 cells per L], CD3 lymphocyte count of 0·462 × 109 cells per L [0·9–4·5 × 109 cells per L], and CD8 lymphocyte count of 0·074 × 109 cells per L [0·3–1·6 × 109 cells per L]), increased IgE (2567 kIU/L [<0·35 kIU/L]), low IgM (210 mg/L [450–1400 mg/L]), and peripheral eosinophilia (1·08 × 109 cells per L [0·04–0·4 × 109 cells per L]).

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