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Diagnosis of Reye’s Syndrome

Diagnosis of Reye’s Syndrome

Diagnosis of Reye’s syndrome follows the elicitation of a proper medical history and detailed physical examination. A number of blood tests (mostly to assess the function of liver) are ordered.

  • Ammonia level as high as 1.5 times normal 24-48 hours after the onset of mental status changes is the commonest laboratory irregularity in Reye’s syndrome.
  • Transaminases levels: The level of liver enzymes ALT (SGPT) and AST(SGOT) increase
  • Bilirubin levels
  • Lactic dehydrogenase (LDH) level: may be high or low
  • Prothrombin time (PT) and activated partial thromboplastin time (aPTT): are prolonged
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  • Lipase and amylase: are elevated
  • Serum bicarbonate: may be increased due to vomiting
  • BUN and creatinine: elevated
  • Glucose: level may be low (hypoglycaemia) especially in children younger than 1 year
  • Anion gap and venous blood gas
  • Urine specific gravity (increased) and ketones (ketonuria)
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Liver biopsy (removal of a sample of liver tissue) may be done

Imaging modalities: Head CT or Head MRI; Electroencephalogram (EEG)

Spinal tap for spinal fluid analysis may be done

It is also important to rule out inborn errors of metabolism in children


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