局所浸潤性膀胱癌に対する膀胱温存を目的とした動注化学療法の検討

Abstract

To evaluate intra-arterial chemotherapy for bladder preservation in patients with locally advanced bladder cancer. A total of 34 patients with locally advanced bladder cancer (T2, n=25; T3, n=9) were treated with intra-arterial chemotherapy. Chemotherapy was consisted of intraarterial administration of cisplatin (100 mg/body), and adriamycin or pirarubicin (50 mg/body) every 4 weeks for two cycles. The response was evaluated by TUR, urine cytology, CT and/or MRI 4 weeks after the treatment. In 4 patients, we combined this treatment with radiotherapy. Among all 34 patients, 12 (35%) patients presented complete response (CR) and 24 patients (70%) presented in objective response (OR). During mean follow up period of 28.7 months, five patients had locally advanced recurrence and one had distant metastasis. The 5-year survival rate was 69.3%. Bladder was conserved in 19 (56%) of all 34 patients. Hematological and gastrointestinal toxicity (more than grade 3) was occurred in 5 and 3 patients. Risk factors on the outcome of this therapy were tumor size >20 mm, multiple tumors and clinical stage > or = cT3. Patients with no or one risk factor had favorable outcomes; the OR rates of 75-100%, the bladder preservation rates of 71-75% and the 5-year cancer specific survival rates of 83%. Whereas patients with two or three risk factors had unfavorable outcomes; the OR rates of 50-58%, the bladder preservation rates of 25-42% and the 3-year cancer specific survival rates of 0-69%. The treatment of locally advanced bladder cancer with intra-arterial chemotherapy seems to be good for patients with less risk factor, but not so good for patients with more risk factors.