Background: In vitro data suggest increased cytotoxicity with Mitomycin C (Mit-C) and Floxuridine (FUDR). Based on these data, we performed a phase II trial of hepatic arterial infusion (HAI) of FUDR and Dexamethasone (Dex) plus high-dose Mit-C for patients with unresectable hepatic metastases from colorectal carcinoma.
Methods: High-dose Mit-C (15 mg/m2) was added via the pump sideport to HAI FUDR and Dex for 14 days of a 28-day cycle. Mit-C was given on days 1 and 29, and FUDR was given indefinitely until disease progression or discontinuation of therapy due to toxicity.
Results: Sixty-three patients with unresectable liver metastases were entered. The chemotherapy-naïve group (n = 26) and those previously treated (n = 37) had similar response and median survival: 73% and 70%, and 23 and 20 months, respectively. The major toxicities were liver bilomas (7.9%), elevation in bilirubin level >3 (22%), and biliary sclerosis (9.5%). Hematologic and gastrointestinal toxicity was less than 2%.
Conclusion: The addition of high-dose Mit-C to HAI FUDR and Dex produced a high response rate even in previously treated patients. The median survival was 21 months even though half the patients were previously treated with chemotherapy. Biliary toxicity was higher than expected; therefore, alternatives to high dose Mit-C should be investigated when exploring additions to HAI therapy with FUDR and Dex.
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