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Related Experiment Videos

Postencephalitic chronic granulomatous disease.

J M Prats Viñas1, M J Martinez Gonzalez, A Garcia Ribes

  • 1Neuropediatric Unit, Hospital de Cruces, Vizcaya, Spain. jprats@heru.osakidetza.net

Pediatric Neurology
|September 26, 2006
PubMed
Summary

Herpes simplex encephalitis can evolve into a chronic granuloma, a rare condition diagnosed by biopsy. This case highlights a missed diagnosis of chronic granuloma mistaken for neurosarcoidosis.

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Area of Science:

  • Neurology
  • Pathology

Background:

  • Herpes simplex virus type 1 (HSV-1) encephalitis is a severe neurological condition.
  • Long-term sequelae of HSV-1 encephalitis are not fully understood.

Observation:

  • A 13-year-old female, previously diagnosed with HSV-1 encephalitis at age 8, developed intracranial hypertension syndrome.
  • A new lesion in the right temporal lobe showed no viral presence in cerebrospinal fluid.
  • Histological examination revealed chronic granuloma with multinucleated giant cells and calcifications.

Findings:

  • The patient was initially misdiagnosed with neurosarcoidosis and remained steroid-dependent for four years.
  • Steroid dependency was resolved with Infliximab treatment.
  • The condition represents a unique evolutionary pattern of HSV-1 encephalitis to chronic granuloma.

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Implications:

  • This granulomatous evolution of HSV-1 encephalitis may be an overlooked diagnostic entity.
  • Accurate diagnosis requires histological examination via biopsy.
  • This case underscores the importance of considering rare post-encephalitic complications.