" /> Immunodeficiency due to purine nucleoside phosphorylase deficiency - CISMeF





Preferred Label : Immunodeficiency due to purine nucleoside phosphorylase deficiency;

ICD-11 definition : Purine nucleoside phosphorylase deficiency is a purine metabolism disorder resulting in combined T and B cell immunodeficiency that results in recurrent infections. Children are particularly prone to viral infections (chicken pox, mumps, cytomegalovirus) and vaccines, but suppurant bacterial infections have also been noted. One third of all patients have anemia, and 2/3 have neurological signs (ataxia, spastic tetraplegy and tremor).;

ICD-11 synonym : deficiency of inosine phosphorylase; NP deficiency; PNP deficiency; deficiency of purine-nucleoside phosphorylase; NP - [nucleoside phosphorylase] deficiency; Nucleoside phosphorylase deficiency; PNP - [purine nucleoside phosphorylase] deficiency;

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Purine nucleoside phosphorylase deficiency is a purine metabolism disorder resulting in combined T and B cell immunodeficiency that results in recurrent infections. Children are particularly prone to viral infections (chicken pox, mumps, cytomegalovirus) and vaccines, but suppurant bacterial infections have also been noted. One third of all patients have anemia, and 2/3 have neurological signs (ataxia, spastic tetraplegy and tremor).

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08/05/2025


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