Capecitabine vs. S-1 in Unresectable or Recurrent Breast Cancer

2014-08-27 03:40:03 | BioPortfolio


To investigate and compare the efficacy and safety of S-1 vs. Capecitabine as primary chemotherapy in patients with inoperable or recurrent breast cancer.


The incidence of breast cancer is increasing in Japan: 33,676 women were diagnosed with breast cancer in 2001, making it the leading cause of cancer among women since 1995. Statistical database in Exel format/outline of health welfare statistics from the Ministry of Labor, Health, and Welfare show that the number of deaths from breast cancer was 9,806 in 2003. Because the ten-year survival rate is about ninety percent in Stages 0 and I breast cancer patients, detection and treatment at an earlier stage can lead to higher survival rates. However, the recurrence rate increases as the disease progresses. In addition, about thirty percent of all breast cancer patients are believed to have recurrent disease. Thus, developing treatments against recurrence may be an important task.

The Guideline for Breast Cancer Treatment, 2004 version, recommends chemotherapy, including anthracyclines or taxanes as a first-line chemotherapy for metastatic or recurrent (grade B recommendation) breast cancer. In a second-line therapy recommended for metastatic or recurrent diseases, the Guideline reports that a combination of capecitabine, a 5Fu derivative (an oral chemotherapy of pyrimidine fluorides approved in 2003) with docetaxel is superior to docetaxel alone for improving survival. This regimen is recommended for patients with cardiac malfunction who cannot be treated with anthracyclines (grade B recommendation). However, data are lacking to support capecitabine as a standard regimen as a second-line therapy; its efficacy needs verification and further study. Accordingly, this study is designed to investigate the efficacy and safety of S-1 alone, an oral pyrimidine fluoride, to which an indication of "inoperable or recurrent breast cancer" was added, as a first-line therapy in patients with inoperable or recurrent breast cancer by comparing it with Capecitabine alone, which is already approved of the same indication.

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment


Breast Neoplasms


Capecitabine, S-1


Seiko Hospital


Active, not recruiting


Japan Breast Cancer Research Network

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:40:03-0400

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Medical and Biotech [MESH] Definitions

Breast neoplasms that do not express ESTROGEN RECEPTORS; PROGESTERONE RECEPTORS; and do not overexpress the NEU RECEPTOR/HER-2 PROTO-ONCOGENE PROTEIN.

Any neoplasms of the male breast. These occur infrequently in males in developed countries, the incidence being about 1% of that in females.

A deoxycytidine derivative and fluorouracil PRODRUG that is used as an ANTINEOPLASTIC ANTIMETABOLITE in the treatment of COLON CANCER; BREAST CANCER and GASTRIC CANCER.

Neoplasms, usually carcinoma, located within the center of an organ or within small lobes, and in the case of the breast, intraductally. The emphasis of the name is on the location of the neoplastic tissue rather than on its histological type. Most cancers of this type are located in the breast.

Metastatic breast cancer characterized by EDEMA and ERYTHEMA of the affected breast due to LYMPHATIC METASTASIS and eventual obstruction of LYMPHATIC VESSELS by the cancer cells.

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