“…11,12,17,20 This theory is advocated by many authors who believe that aggressive chemotherapy (in a regimen including methotrexate, vinblastine, doxorubicin, and cisplatin) prolongs the duration of tumor remission but does not cross the blood-brain barrier. 4,11,20 In other words, the advent of the new chemotherapy regimen improved the primary and systemic control of the urinary bladder cancer, allowing patients to live long enough to develop cerebral metastasis. 13 According to Rabadán et al, the median time between TCC diagnosis and its metastasis is 12 to 18 months, and usually the patient has multiple organs involved, not only the CNS.…”