Acute ascending motoric paraplegia following intrathecal chemotherapy for treatment of acute lymphoblastic leukemia in children: case reports and review of the literature.

Severe side effects of chemotherapy in pediatric patients with acute lymphoblastic leukemia are rare, but well-known. We present two pediatric patients who developed ascending motoric paraplegia (AMP) following intrathecal chemotherapy. Both patients suffered from progressive weakness of their lower extremities, neurogenic bladder dysfunction, autonomous neural dysregulation and minor sensory deficits. Despite an initially similar clinical picture, progression and outcome were fairly different. There is convincing evidence that AMP is caused by spinal cord toxicity of intrathecally applied toxic agents such as cytarabin and/or methotrexate leading to spinal demyelinisation as demonstrated by elevated myelin basic protein in cerebrospinal fluid.