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PURINE NUCLEOSIDE PHOSPHORYLASE DEFICIENCY (PNP)

PURINE NUCLEOSIDE PHOSPHORYLASE DEFICIENCY (PNP)
NUCLEOSIDE PHOSPHORYLASE; IMMUNODEFICIENCY
613179
OMIM = Online Mendelian Inheritance of Men
760
purine nucleoside phosphorylase
2.4.2.1
14q13.1
D81.5
rare
autosomal recessive
mutation in the PNP gene
Laboratory findingsUric acid dec (serum)
    2-Deoxyguanosine inc (urine)
    2-Deoxyuridine inc (urine)
    Guanosine inc (serum)
    Guanosine inc (urine)
    Inosine inc (urine)
    Inosine inc (serum)
    Nucleoside phosphorylase dec (fibroblasts)
    Nucleoside phosphorylase dec (erythrocytes)
    Orotic acid normal/inc (urine)
    Uric acid dec (urine)
Symptoms    anemia
    ataxia
    behavior, abnormal or bizarre, confusion
    developmental delay
    failure to thrive
    hypertonia, spasticity
    hypotonia
    infections (severe or recurrent)
    infections (urinary tract)
    lymphopenia
    mental retardation
    neutropenia (decreased neutrophils)
    onset, childhood
    onset, infancy
    onset, neonatal
    pneumonia
    spastic diplegia/quadriplegia/tetraplegia
    splenomegaly (large spleen)
    strokelike episodes
    tremor or twitching