Consolidative Proton Radiotherapy for Pediatric Extramedullary Ocular Acute Myeloid Leukemia

Aaron Bush, Don E. Eslin, Michael J. Joyce, Derek Hess, Diana Leon,Ralph P. Ermoian,Raymond B. Mailhot Vega

International Journal of Particle Therapy(2024)

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摘要
Purpose Pediatric acute myeloid leukemia (AML) often involves extramedullary sites, which can be resistant to standard induction chemotherapy. Consolidative radiation therapy can be used in select cases to improve local control rates and help bridge patients to curative stem cell transplants. However, there is no previously published data to support the use of proton radiotherapy (PT) in this setting. We present radiographic findings and pathologic outcomes of the first reported patient with extramedullary ocular AML to be treated with PT. Patient and Methods Details regarding diagnostic evaluation and treatment were obtained from the electronic medical records at the University of Florida Proton Therapy Institute, Nemours Children’s Health, and St. Joseph’s Children’s Hospital. Results This 7-month-old patient presented with biopsy-proven relapsed AML in the bilateral anterior chambers of the eyes, which did not resolve with induction chemotherapy. The patient then received PT to a dose of 24 cobalt Gray equivalent (CGE) to both eyes and was found to have no evidence of disease following treatment. Conclusion This case provides further evidence that consolidative radiotherapy may be considered for select patients with extramedullary AML who have limited response to induction chemotherapy. Given the increased prevalence of extramedullary AML in pediatric patients, it is worth considering the utilization of PT to mitigate damage to nearby organs and the risk of secondary malignancies.
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pediatrics,acute myeloid leukemia,proton therapy,extramedullary AML
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