Phase II study of the combination cisplatin, etoposide, 5-fluorouracil and folinic acid in patients with advanced squamous cell carcinoma of the esophagus.

The objective of this study was to determine the toxicity and the efficacy of the combination of cisplatin, etoposide, 5-fluorouracil (5-FU) and folinic acid in the treatment of patients with advanced squamous cell carcinoma of the esophagus. Patients received cisplatin 80 mg/m 2 i.v. on day 1, etoposide 125 mg/m 2 i.v. on day 1 and etoposide 200 mg/m 2 p.o. on days 3 and 5, 5-FU 375 mg/m 2 /day continuously i.v. combined with folinic acid 30 mg p.o. 6 times per day on days 1-4. Courses were repeated every 4 weeks until progression or up to a maximum of 6 courses. Patients were evaluated for response after every two courses. Sixty-nine patients received a total of 291 courses (median 4, range 1-6). The hematological toxicity consisted of leukocytopenia grade 3 or 4 in 17 and 16% of patients, respectively. Leukocytopenic fever was seen in 19% of patients. Thrombocytopenia grade 3 or 4 was seen in 13 and 7% of patients, respectively. Non-hematological toxicity consisted of nausea/vomiting grade 3 in 32%, diarrhea grade 3 in 6% and mucositis grade 3 or 4 in 23% of patients. The overall response rate was 34% (complete response 4%, partial response 30%) and the median time to progression was 7 months in 13 patients who received no additional treatment. The median survival for all patients was 9.5 months with a 1-year survival rate of 36%. Ten patients with initially locally unresectable disease (N=2) or celiac or supraclavicular lymph node metastases (N=8) who received additional treatment (esophageal resection in seven patients and radiotherapy in three patients) after they had responded to chemotherapy had a 3-year survival of 50%. We conclude that the combination cisplatin and etoposide combined with 5-FU and folinic acid is a safe and active regimen for patients with advanced squamous cell carcinoma of the esophagus. Mucositis is the most prevalent toxicity.