Journal of Clinical Oncology, Vol 15, 625-631, Copyright © 1997 by American Society of Clinical Oncology
Phase II study of irinotecan in prior chemotherapy-treated squamous cell carcinoma of the cervix
CF Verschraegen, T Levy, AP Kudelka, E Llerena, K Ende, RS Freedman, CL Edwards, M Hord, M Steger, AL Kaplan, D Kieback, A Fishman and JJ Kavanagh
University of Texas M.D. Anderson Cancer Center, Houston 77030, USA. cverschr@notes.mdacc.tmc.edu
PURPOSE: A phase II study was performed to evaluate the antitumor activity
and toxicity of irinotecan (CPT-11), a water-soluble derivative of
camptothecin, in patients with prior chemotherapy-treated squamous cell
cancer of the cervix. PATIENTS AND METHODS: Forty-two patients were
included in the study. The median age was 44 years (range, 24 to 59 years).
The median Zubrod performance status was 1. All patients were refractory to
first-line chemotherapy and 88% had received prior radiotherapy. The
initial dose of CPT-11 was 125 mg/m2 given as a weekly 90-minute
intravenous infusion for 4 weeks, every 6 weeks. Subsequent doses were
unchanged, reduced, or omitted according to toxicity grade. RESULTS:
Forty-two patients were assessable for response. The overall response rate
was 21%. The median time to response was 6 weeks and the median duration of
response was 12 weeks. The overall median duration of survival was 6.4
months. A statistically significant survival advantage (median of 12.6 v
5.1 months) was found in patients whose disease responded to the treatment
(P < .015). The major dose-limiting toxic effects (grade > or = 3)
were nausea and vomiting (45%), diarrhea (24%), and granulocytopenia (36%).
Grade > or = 3 anemia was encountered in 62% of patients and the
incidence of thrombocytopenia was negligible. Less severe side effects were
alopecia (48%), drug fever (43%), anorexia (33%), fatigue (33%), skin rash
(21%), stomatitis (14%), and allergic reaction (9%). The gastrointestinal
intolerance was dose-related. The incidence of bone marrow depression did
not decrease with dose reduction, possibly because of a cumulative effect
or hematologic intolerance by a subset of patients. CONCLUSIONS: CPT-11 has
significant activity in refractory cervical carcinoma. Gastrointestinal
intolerance and hematologic toxicity must be monitored carefully. Further
studies of alternative schedules may improve the tolerance and response
rate.
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