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Leukoencephalopathy after prophylactic radiation for leukaemia in ataxia telangiectasia
J A Eyre1, D Gardner-Medwin, G P Summerfield
1Department of Child Health, Medical School, University of Newcastle upon Tyne.
Insights
Children with ataxia telangiectasia (AT) face a higher risk of acute lymphoblastic leukemia (ALL) and are sensitive to cancer treatments. This case highlights a child with undiagnosed AT who developed leukoencephalopathy after ALL treatment.
Area of Science:
- Pediatric Oncology
- Neuro-oncology
- Genetics
Background:
- Ataxia telangiectasia (AT) is a rare genetic disorder with increased cancer risk, particularly acute lymphoblastic leukemia (ALL).
- Patients with AT exhibit heightened sensitivity to DNA-damaging agents like chemotherapy and radiation therapy.
- Central nervous system (CNS) prophylaxis is a standard treatment for ALL to prevent or treat leukemia spread to the brain.
Observation:
- A 5.5-year-old boy presented with acute lymphoblastic leukemia (ALL) while having an undiagnosed condition of ataxia telangiectasia (AT).
- The patient received conventional chemotherapy and irradiation as part of his ALL treatment protocol.
- Following treatment, the child developed leukoencephalopathy, a serious neurological condition affecting the brain's white matter.
Findings:
- This case illustrates the complex interplay between AT, ALL, and treatment-related toxicities.
- The development of chemoradiation-induced leukoencephalopathy underscores the heightened sensitivity of AT patients to standard ALL therapies.
- Undiagnosed AT can complicate the management of pediatric leukemia, leading to severe adverse events.
Implications:
- Early diagnosis of AT in children presenting with leukemia is crucial for tailoring treatment plans.
- Treatment protocols for pediatric leukemia in patients with AT may require modification to mitigate risks of severe neurotoxicity.
- This case emphasizes the need for increased awareness and vigilance among clinicians regarding AT complications in leukemia patients.
Abstract:
Children with ataxia telangiectasia have a high probability of developing acute lymphoblastic leukaemia, and have increased sensitivity to chemotherapy and irradiation. We report a 51/2 year old boy who had undiagnosed ataxia telangiectasia when he presented with acute lymphoblastic leukaemia. He subsequently developed a chemoradiation induced leukoencephalopathy after conventional central nervous system prophylaxis.
