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Pilocytic astrocytoma: unusual feature
S Berroir1, F Lafitte, F Héran
1Services d'imagerie médicale, Fondation ophtalmologique A. de Rothschild, 19-25, rue Manin, 75019 Paris, France.
Journal of Neuroradiology = Journal De Neuroradiologie
|April 2, 2002
Summary
Juvenile pilocytic astrocytoma, a common pediatric brain tumor, can rarely occur in adults. This case highlights a posterior fossa pilocytic astrocytoma in a 42-year-old, emphasizing its unusual presentation in adults.
Area of Science:
- Neuro-oncology
- Pediatric Neurosurgery
- Neuroradiology
Background:
- Juvenile pilocytic astrocytoma (JPA) is a well-defined, common brain tumor primarily affecting children and young adults.
- JPAs typically present in the posterior fossa with characteristic cystic and enhancing mural nodule imaging features.
- Complete surgical resection of JPA generally leads to an excellent prognosis.
Observation:
- Adult cases of JPA are rare and predominantly occur in the cerebral hemispheres.
- This report details a unique case of a 42-year-old male with a large, heterogeneous posterior fossa lesion.
- The lesion's location and imaging characteristics were atypical for adult brain tumors.
Findings:
- Histopathological analysis confirmed the lesion as a juvenile pilocytic astrocytoma.
- The adult posterior fossa presentation mimicked infectious lesions, posing a diagnostic challenge.
- This case underscores the importance of considering JPA in atypical adult presentations.
Implications:
- Recognizing JPA in adults, especially with posterior fossa involvement, is crucial for accurate diagnosis.
- Atypical presentations of JPA in adults can be misdiagnosed as infectious etiologies.
- This case expands the understanding of JPA's clinical spectrum and diagnostic considerations in adult neuro-oncology.