Report of a case of Nezelof syndrome.
: In this report, we present a 5 months old male baby, who suffered from watery diarrhea since 4 days old. From then on, he had been admitted 3 times in 3 different hospitals but the symptoms still bothered him off and on. During the days of hospitalization, sepsis with positive blood culture of Klebsiella was noted. The patient expired at 5 months of age. The T cell count was 20% active T was 0. Delayed hypersensitivity skin tests including Candida (10 X), PHA (10 micrograms), PHA (1 microgram), SK/SD (50 units) were negative. The granulocyte function study showed normal. Immunoglobulin analysis revealed IgG: 1320 mg%, IgA: 120 mg%, IgM: 100 mg%. Agenesis of thymus, failure of lymphoid differentiation and abnormal lymphoid architecture with absence of germinal centers were noted at autopsy. Combined immunodeficiency with normal immunoglobulins (Nezelof syndrome) is a disease of primary immunodeficiency characterized by recurrent infections, failure to thrive, lymphopenia, diminished lymphoid tissue, abnormal structure or agenesis of the thymus, and presence of normal or increased levels of one or more of the major immunoglobulin classes, but with impaired antibody synthesis. Since its original description by Nezelof and associates in 1964, it has been reported on the subsequent occasion. In this report, we present our one experience and review the clinical and laboratory data in 33 reported cases.