Abstract
Intrathecal therapy with cytarabine is widely used in the treatment of acute lymphocytic leukemia. We report the first case of accidental intrathecal cytarabine overdose in an adult patient. Overdose of intrathecal chemotherapy has been reported to cause severe neurological damage including seizures, coma and death. Methotrexate levels can help guide intrathecal dosing of methotrexate, but no such test is commercially available for cytarabine. There are no standardized treatment recommendations for the management of this medical emergency. Intrathecal methotrexate overdose has been variously treated with cerebrospinal fluid drainage or exchange. Ventriculo-lumbar perfusion, steroids and leucovorin have also been used. It seems crucial to quickly remove as much drug as possible from the cerebrospinal fluid. Our patient was successfully treated with large-volume cerebrospinal fluid aspiration through an Ommaya reservoir. She did not suffer any significant immediate or late complications at 4 months of follow-up.
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