Death Causes Among Iranian Children With Leukodystrophies.

Leukodystrophies are a heterogeneous group of inherited neurologic disorders. These disorders are indeed progressive and debilitating conditions with limited treatment options and high mortality rates. There is a deficiency in available data concerning both the mortality rates and the most common causes of death in leukodystrophies. We investigated the mortality rates, mean age at death, and the most common causes of death in a retrospective cohort of 165 Iranian pediatric patients who were diagnosed with leukodystrophies. Death was recorded in 64 of 165 patients (38.8%) with a mean follow-up of 4.7 ± 3.25 years. The mean age of living patients was 7.9 ± 4.8 years and the mean age at death was 5.2 ± 3.9 years. Mortality rate of the entire cohort was 18.1% (30/165), 24.2% (40/165), and 35.7% (59/165) at 3, 5, and 10 years' follow-up, respectively. The mean age at death was 2.13 ± 0.68 years, 2.67 ± 1.14 years, and 4.33 ± 2.73 years, at 3-, 5-, and 10-year follow-up from first symptom onset, correspondingly. However, there was a significant difference in the mean age at death in years in hypomyelinating leukodystrophies compared with other leukodystrophies (2.19 0.19 standard error [SE], confidence interval [CI] 1.81-2.56; and 6.65 ± 0.62 SE (CI 5.42-7.87); log rank = .0001, analysis of variance = .0001). The most common causes of death were cardiopulmonary problems (47%), seizures (11%), sepsis (9%), and miscellaneous (33%). We proposed that a significant majority of childhood leukodystrophy deaths occur within the first 5 years of life, with a notable concentration during the initial 3 years. Further, the results of this study suggest the potential for targeted strategies to address the specific causes of death in children with leukodystrophies.