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Reversible delayed radiation effect on the brain after radiotherapy of malignant astrocytoma
Abstract:
A 14-year-old boy with a malignant astrocytoma in the third ventricle, who showed reversible delayed radiation effects on the brain, is presented. One and a half months after the completion of a course of radiation therapy, the patient gradually became drowsy complaining of headaches, general malaise and disturbance of gait. The symptoms and abnormalities in the CT scans were the most severe seven months after irradiation and then spontaneously subsided. CT scan could not differentiate it from a recurrence of the tumor when first seen, but was extremely useful in following these findings.
Insights
A pediatric patient experienced delayed radiation effects on the brain after astrocytoma treatment. These effects mimicked tumor recurrence on CT scans but spontaneously resolved.
Area of Science:
- Neuro-oncology
- Pediatric Radiology
- Radiation Oncology
Background:
- Malignant astrocytoma in the third ventricle is a rare pediatric brain tumor.
- Radiation therapy is a common treatment modality for pediatric brain tumors.
- Delayed radiation effects can complicate the assessment of treatment response.
Observation:
- A 14-year-old boy with a third ventricular malignant astrocytoma developed delayed neurological symptoms post-radiation therapy.
- Symptoms included drowsiness, headaches, gait disturbance, and malaise, appearing 1.5 months after treatment.
- CT scans revealed abnormalities that worsened over time, peaking at 7 months post-irradiation.
Findings:
- The observed clinical and radiological changes were consistent with delayed radiation effects.
- These effects were initially indistinguishable from tumor recurrence on CT imaging.
- The patient's symptoms and CT abnormalities showed spontaneous resolution over time.
Implications:
- This case highlights the importance of considering delayed radiation effects in the differential diagnosis of neurological changes after brain tumor treatment in children.
- CT imaging plays a crucial role in monitoring these reversible effects.
- Understanding the temporal evolution of radiation-induced changes is vital for accurate patient management and avoiding unnecessary interventions.