Leukemia patient dies, possibility of unprescribed liquid mixed in injection

At Saitama City's Saitama Children's Medical Center, a teenage patient undergoing leukemia treatment has died, and two others are in critical condition. Three individuals experienced health deterioration after receiving "intrathecal chemotherapy" for leukemia. Since an unprescribed liquid was detected in their cerebrospinal fluid, the hospital is investigating the possibility that this liquid was mixed into the injection due to some cause.