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Chūō-ku, Japan

Kosaka Y.,Kitasato University | Rai Y.,Hakuaikai Sagara Hospital | Masuda N.,Breast Oncology | Takano T.,Toranomon Hospital | And 6 more authors.
Supportive Care in Cancer | Year: 2015

Purpose: Pegfilgrastim is a pegylated form of filgrastim, a recombinant protein of granulocyte colony-stimulating factor, that is used to reduce the risk of febrile neutropenia (FN). Here, we report the results of a phase III trial of pegfilgrastim in breast cancer patients receiving docetaxel and cyclophosphamide (TC) chemotherapy. Methods: We conducted a double-blind, placebo-controlled, randomized trial to determine the efficacy of pegfilgrastim in reducing the risk of FN in early-stage breast cancer patients. A total of 351 women (177 in the pegfilgrastim group and 174 in the placebo group) between 20 and 69 years of age with stage I–III invasive breast carcinoma who were to receive TC chemotherapy (docetaxel 75 mg/m2 and cyclophosphamide 600 mg/m2 every 3 weeks) as either neoadjuvant or adjuvant therapy were enrolled; 346 of these patients were treated with either pegfilgrastim (n = 173) or placebo (n = 173). Results: The incidence of FN was significantly lower in the pegfilgrastim group than in the placebo group (1.2 vs. 68.8 %, respectively; P < 0.001). In addition, patients in the pegfilgrastim group required less hospitalization and antibiotics for FN. Most adverse events were consistent with those expected for breast cancer subjects receiving TC chemotherapy. Conclusions: Pegfilgrastim is safe and significantly reduces the incidence of FN in breast cancer patients. © 2015, Springer-Verlag Berlin Heidelberg. Source


Katayama H.,Clinical Data | Kurokawa Y.,Osaka University | Nakamura K.,Clinical Data | Ito H.,Kanagawa Cancer Center | And 7 more authors.
Surgery Today | Year: 2016

Purpose: Prior to publication of the Clavien-Dindo classification in 2004, there were no grading definitions for surgical complications in either clinical practice or surgical trials. This report establishes supplementary criteria for this classification to standardize the evaluation of postoperative complications in clinical trials. Methods: The Japan Clinical Oncology Group (JCOG) commissioned a committee. Members from nine surgical study groups (gastric, esophageal, colorectal, lung, breast, gynecologic, urologic, bone and soft tissue, and brain) specified postoperative complications experienced commonly in their fields and defined more detailed grading criteria for each complication in accordance with the general grading rules of the Clavien-Dindo classification. Results: We listed 72 surgical complications experienced commonly in surgical trials, focusing on 17 gastroenterologic complications, 13 infectious complications, six thoracic complications, and several other complications. The grading criteria were defined simply and were optimized for surgical complications. Conclusions: The JCOG postoperative complications criteria (JCOG PC criteria) aim to standardize the terms used to define adverse events (AEs) and provide detailed grading guidelines based on the Clavien-Dindo classification. We believe that the JCOG PC criteria will allow for more precise comparisons of the frequency of postoperative complications among trials across many different surgical fields. © 2015, The Author(s). Source


Ishitobi M.,Japan National Cardiovascular Center Research Institute | Okumura Y.,Kumamoto City Hospital | Arima N.,Kumamoto City Hospital | Yoshida A.,St. Lukes International Hospital | And 11 more authors.
Annals of Surgical Oncology | Year: 2013

Background: There is little information about the impact of breast cancer subtype on prognosis after ipsilateral breast tumor recurrence (IBTR). Methods: One hundred eighty-five patients were classified according to breast cancer subtype, as approximated by estrogen receptor, human epidermal growth factor receptor 2 (HER2), and Ki-67, of IBTR, and we evaluated whether breast cancer subtype was associated with distant recurrence after IBTR. Results: There was a significant difference in distant disease-free survival (DDFS) after IBTR according to breast cancer subtype defined by a cutoff of the Ki-67 index of 20 % (p = 0.0074, log-rank test). The 5-year DDFS rates for patients with luminal A, luminal B, triple-negative, and HER2 types were 86.3, 57.1, 56.6, and 65.9 %, respectively. In addition, breast cancer subtype was significantly associated with distant recurrence after IBTR on adjustment for various clinicopathologic factors (p = 0.0027, Cox proportional hazards model). Conclusions: Our study suggests that breast cancer subtype based on immunohistochemical staining predicts the outcomes of patients with IBTR. Further analyses are needed (UMIN-CTR number UMIN000008136). © 2013 Society of Surgical Oncology. Source


Aogi K.,National Hospital Organization Shikoku Cancer Center | Rai Y.,Sagara Hospital Hakuaikai | Ito Y.,Cancer Institute Hospital | Masuda N.,Breast Oncology | And 4 more authors.
Cancer Chemotherapy and Pharmacology | Year: 2013

Purpose: Anthracycline and taxane resistance is a key issue in the treatment of metastatic breast cancer (MBC), particularly in Asian patients who often present with advanced disease. The objective of this study was to investigate the efficacy and safety of ixabepilone monotherapy in Japanese patients with taxane-resistant MBC previously treated with anthracycline. Patients and methods: Japanese patients with taxane-resistant MBC previously treated with anthracycline were treated with 40 mg/m2 ixabepilone every 3 weeks. Primary endpoint was overall response rate. Secondary endpoints included duration of response, time to progression (TTP), and safety. Results: Fifty-two patients were treated with ixabepilone. Overall response rate was 11.5 % (95 % confidence interval 4.4-23.4), stable disease rate was 38.5 %, duration of response was 3.6 months (range 2.4-5.3 months), and TTP was 2.8 months (range 0.7-8.1 months). The most frequent grade 3/4 toxicities were neutropenia (82.7 %), leukopenia (75 %), myalgia (19.2 %), and peripheral neuropathy (19.2 %). Conclusion: Ixabepilone monotherapy was effective and toxicities were manageable in this phase II study of Japanese patients with taxane-resistant metastatic breast cancer previously treated with anthracyclines. © 2013 Springer-Verlag Berlin Heidelberg. Source


Iwata H.,Aichi Cancer Center Hospital | Masuda N.,Breast Oncology | Sagara Y.,Sagara Hospital | Kinoshita T.,National Cancer Center Hospital | And 10 more authors.
Cancer | Year: 2013

Background: The increasing costs associated with large-scale adjuvant trials mean that the prognostic value of biologic markers is increasingly important. The expression of nuclear antigen Ki-67, a marker of cell proliferation, has been correlated with treatment efficacy and is being investigated for its value as a predictive marker of therapeutic response. In the current study, the authors explored correlations between Ki-67 expression and tumor response, estrogen receptor (ER) status, progesterone receptor (PgR) status, and histopathologic response from the STAGE study (S-tudy of T-amoxifen or A-rimidex, combined with G-oserelin acetate to compare E-fficacy and safety). METHODS: In a phase 3, double-blind, randomized trial (National Clinical Trials identifier NCT00605267), premenopausal women with ER-positive, early stage breast cancer received either anastrozole plus goserelin or tamoxifen plus goserelin for 24 weeks before surgery. The Ki-67 index, hormone receptor (ER and PgR) status, and histopathologic responses were determined from histopathologic samples that were obtained from core-needle biopsies at baseline and at surgery. Tumor response was determined by using magnetic resonance imaging or computed tomography. RESULTS: In total, 197 patients were randomized to receive either anastrozole plus goserelin (n = 98) or tamoxifen plus goserelin (n = 99). The best overall tumor response was better for the anastrozole group compared with the tamoxifen group both among patients who had a baseline Ki-67 index ≥20% and among those who had a baseline Ki-67 index <20%. There was no apparent correlation between baseline ER status and the Ki-67 index in either group. Positive PgR status was reduced from baseline to week 24 in the anastrozole group. CONCLUSIONS: In premenopausal women with ER-positive breast cancer, anastrozole produced a greater best overall tumor response compared with tamoxifen regardless of the baseline Ki-67 index. © 2012 American Cancer Society. Source

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