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  • Title: Cranial Irradiation for Childhood Cancers and Adult Risk of Meningioma.
    Author: Garcia CM, Ganga A, Weil RJ, Toms SA.
    Journal: Pediatr Neurosurg; 2022; 57(6):396-406. PubMed ID: 36252549.
    Abstract:
    INTRODUCTION: Following cranial irradiation, there is an increased risk of developing secondary neoplasms, especially meningiomas. Despite childhood cancer survivors who have undergone cranial irradiation having an increased risk of acquiring radiation-induced meningioma (RIM), there is no widely used standard guideline for meningioma screening. METHODS: At a single institution, we reviewed three adult survivors of childhood cancer who were treated for RIM between 2010 and 2020. We recorded age at diagnosis for the primary lesion, the radiation dose, age at RIM diagnosis, and tumor characteristics including treatment, pathology, and outcome. Two had had T-cell acute lymphocytic leukemia and one a rhabdomyosarcoma. The age of diagnosis of the RIM ranged from 20 to 40 years, with latencies ranging from 18 to 33 years. All lesions were classified as WHO Grade I meningiomas, and only 1 patient had a subsequent recurrence. A literature search identified articles that address RIM: a total of 684 cases were identified in 36 publications. RESULTS: Mean radiation doses ranged from 1.4 gray to 70 gray. Mean age of diagnosis for secondary meningioma ranged from 8 to 53.4 years old, with latency periods ranging from 2.8 to 44 years. Given variability in the way that investigators have published their results, it is difficult to make a single recommendation for RIM screening. Using our experience and the literature, we devised two different screening protocols and calculated their expense. CONCLUSIONS: We recommend that data be standardized in a registry to provide greater insight into the clinical and resource allocation questions, especially as long-term survival of children with pediatric cancer into full adulthood becomes more commonplace worldwide.
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