Abstract:
BACKGROUND:Residual cancer burden or Ki67 expression levels in residual tumors reportedly provided significant prognostic information for a non-pathological complete response subset after neoadjuvant chemotherapy (NAC). However, the significance of Ki67 reduction for clinical response during chemotherapy in each subtype or menopausal status is yet to be determined. METHODS:A total of 183 breast cancers surgically removed after chemotherapy were recruited for this study. Expression levels of estrogen receptor (ER), progesterone receptor (PgR), and Ki67 were determined immunohistochemically for semiquantitative measurement and these biomarkers were compared in pre- and post-NAC samples from pathological non-responders (n = 125). Responses to chemotherapy were evaluated both clinically and pathologically. RESULTS:Ki67 expression levels after NAC (median 5 %, range 0-70 %) were significantly reduced compared with before NAC (25, 1-80 %, P < 0.0001), but only in patients who attained clinical response. This significant suppression of Ki67 in clinical responders was consistently observed in breast cancers from the ER-positive subset, but not the ER-negative subset in the total test set (n = 120). These observations were also made in the validation set (n = 63). Among premenopausal, but not postmenopausal patients, a significant decrease in PgR expression levels was detected in breast cancers of patients who attained clinical response (pre-NAC 50, 0-100 %, post-NAC 5, 0-20 %; P = 0.0003). CONCLUSION:The impact of Ki67 suppression on clinical response seems to be restricted to ER-positive breast cancers. Since PgR expression levels of premenopausal ER-positive cancers were significantly reduced in clinical responders, inhibition of estrogen signaling due to chemotherapy-induced amenorrhea may be involved in this association.
journal_name
Int J Clin Oncoljournal_title
International journal of clinical oncologyauthors
Enomoto Y,Morimoto T,Nishimukai A,Higuchi T,Yanai A,Miyagawa Y,Murase K,Imamura M,Takatsuka Y,Nomura T,Takeda M,Watanabe T,Hirota S,Miyoshi Ydoi
10.1007/s10147-015-0897-1subject
Has Abstractpub_date
2016-04-01 00:00:00pages
254-261issue
2eissn
1341-9625issn
1437-7772pii
10.1007/s10147-015-0897-1journal_volume
21pub_type
杂志文章abstract:BACKGROUND:Detailed information is not currently available on the incidence, natural course, and management of asymptomatic abnormal prostate findings incidentally detected by radiologic evaluations after BCG therapy for non-muscle-invasive bladder cancer patients. METHODS:We identified 38 patients who were evaluated ...
journal_title:International journal of clinical oncology
pub_type: 杂志文章
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更新日期:2017-06-01 00:00:00
abstract::Primary sarcoma of the fallopian tube is a very rare neoplasm. We report the case of a 69-year-old woman affected with leiomyosarcoma of the left fallopian tube. Her chief complaint was lower abdominal pain. The preoperative diagnosis was a left adnexal malignant tumor based on pelvic examination, abdominal computed t...
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abstract:BACKGROUND:It is often difficult to diagnose large cell neuroendocrine carcinomas (LCNEC) of the lung using small biopsy specimens. Some recent studies attempted to diagnose LCNEC using biopsy specimens; in 2011, the International Association for the Study of Lung Cancer pathological panels suggested possible LCNEC as ...
journal_title:International journal of clinical oncology
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doi:10.1007/s10147-012-0509-2
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abstract::A 38-year-old woman underwent mastectomy and axillary lymph node dissection for invasive ductal carcinoma with multiple lymph node involvement. The patient received adriamycin 60 mg/m(2) and cyclophosphamide 600 mg/m(2) followed by weekly paclitaxel 80 mg/m(2) (without interruption) as adjuvant treatment. After receiv...
journal_title:International journal of clinical oncology
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abstract:BACKGROUND:Hypofractionated proton therapy (HFPT) is expected to become an effective treatment approach for localized prostate cancer (PCa). The purpose of this study was to evaluate differences in acute toxicity among patients with localized PCa treated with either conventional fractionated proton therapy (CFPT) or HF...
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pub_type: 临床试验,杂志文章
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更新日期:2007-08-01 00:00:00
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更新日期:2002-08-01 00:00:00
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