Oral ethinylestradiol in castration-resistant prostate cancer: a 10-year experience.
Int J Urol
; 22(1): 98-103, 2015 Jan.
Article
in En
| MEDLINE
| ID: mdl-25186970
ABSTRACT
OBJECTIVES:
To describe our 10-year experience with the use of oral ethinylestradiol in the treatment of metastatic castration-resistant prostate cancer.METHODS:
From February 2000 to April 2010, 116 patients with a metastatic castration-resistant prostate cancer were prospectively submitted to oral ethinylestradiol monotherapy. Inclusion criteria were diagnosis of castration-resistant prostate cancer after failure of at least two lines of androgen deprivation therapy and radiological evidence of metastases. Exclusion criteria were symptomatic cases with a European Cooperative Oncology Group score >2 and severe or uncontrolled cardiovascular diseases. At inclusion in the study, all patients discontinued the previous androgen deprivation therapy and started oral ethinylestradiol at the daily dose of 1 mg. Aspirin (100 mg/daily) was concomitantly given.RESULTS:
The median ethinylestradiol therapy duration was 15.9 months (range 8-36 months), whereas the median follow up of patients was 28 months (range 13-36 months). During ethinylestradiol therapy, a confirmed prostate-specific antigen response was found in 79 patients (70.5%). The median time to prostate-specific antigen progression was 15.10 months (95% confidence interval 13.24-18.76 months). A toxicity requiring treatment cessation was observed in 26 patients (23.2%) at a median time of 16 months (mainly thromboembolism).CONCLUSIONS:
Our 10-year experience shows that ethinylestradiol provides a prostate-specific antigen response in a high percentage of patients with metastatic castration-resistant prostate cancer. Cardiovascular toxicity can be managed through accurate patient selection, close follow up and a concomitant anticoagulation therapy.Key words
Full text:
1
Database:
MEDLINE
Main subject:
Antineoplastic Agents, Hormonal
/
Ethinyl Estradiol
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Prostatic Neoplasms, Castration-Resistant
Type of study:
Observational_studies
/
Prognostic_studies
Limits:
Aged
/
Humans
/
Male
/
Middle aged
Country/Region as subject:
Europa
Language:
En
Year:
2015
Type:
Article