Alternative titles and symbols : Nucleoside phosphorylase deficiency;
Description : Purine nucleoside phosphorylase deficiency is a rare autosomal recessive immunodeficiency
disorder characterized mainly by decreased T-cell function. Some patients also have
neurologic impairment (review by Aust et al., 1992).;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the purine nucleoside phosphorylase gene (PNP, 164050.0001);
Neoplasia : Lymphoma; Lymphosarcoma;
Laboratory abnormalities : Reduced erythrocyte purine nucleoside phosphorylase activity; Low serum uric acid; Low urine uric acid; High serum inosine levels; High serum guanosine levels; High urinary excretion of inosine, 2'deoxyinosine, guanosine, and 2'deoxyguanosine;