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Published in: Journal of Cancer Research and Clinical Oncology 5/2008

01-05-2008 | Original Paper

Low nuclear grade but not cell proliferation predictive of pathological complete response to docetaxel in human breast cancers

Authors: Yasuo Miyoshi, Masafumi Kurosumi, Junichi Kurebayashi, Nariaki Matsuura, Masato Takahashi, Eriko Tokunaga, Chiyomi Egawa, Norikazu Masuda, Seung Jin Kim, Masatsugu Okishiro, Tetsu Yanagisawa, Satsuki Ueda, Tetsuya Taguchi, Yasuhiro Tamaki, Shinzaburo Noguchi, The Collaborative Study Group of Scientific Research of the Japanese Breast Cancer Society

Published in: Journal of Cancer Research and Clinical Oncology | Issue 5/2008

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Abstract

Purpose

Predictive factors for response to docetaxel in human breast cancers have yet to be identified. The aim of the present study was to investigate the relationship of various clinicopathological and biological parameters with pathological response to docetaxel in the neoadjuvant setting.

Methods

The study population comprised 78 patients with primary breast cancers who were treated with docetaxel [60 mg/m2; four (median) cycles, range 3–6; q3w] as neoadjuvant therapy and subsequently treated with mastectomy or breast conserving surgery. Tumor samples obtained before chemotherapy were subjected to histological examination and immunohistochemistry of HER-2 and Ki-67.

Results

The pathological complete response (pCR) rate was significantly (P = 0.04) higher for tumors with low nuclear grade (NG-I or -II) (21%) than for tumors with high NG (NG-III) (5%). The pCR rate (20%) of small (≤5 cm) tumors was marginally significantly (P = 0.05) higher than that of large (>5 cm) tumors (5%). Combined analysis of NG and tumor size showed that low-NG small tumors have a higher response rate (30%) than high-NG small tumors (11%; P = 0.13), low-NG large tumors (11%; P = 0.15), and high-NG large tumors (0%; P = 0.009). No statistically significant association was observed between pCR rate and menopausal status, lymph node status, ER, PR, HER-2, or Ki-67.

Conclusions

Low nuclear grade, but not cell proliferation determined by Ki-67, is associated with a good pathological response to docetaxel. Combination of low nuclear grade and small tumor size may be useful for the selection of breast tumors with a high pCR rate (30%).
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Metadata
Title
Low nuclear grade but not cell proliferation predictive of pathological complete response to docetaxel in human breast cancers
Authors
Yasuo Miyoshi
Masafumi Kurosumi
Junichi Kurebayashi
Nariaki Matsuura
Masato Takahashi
Eriko Tokunaga
Chiyomi Egawa
Norikazu Masuda
Seung Jin Kim
Masatsugu Okishiro
Tetsu Yanagisawa
Satsuki Ueda
Tetsuya Taguchi
Yasuhiro Tamaki
Shinzaburo Noguchi
The Collaborative Study Group of Scientific Research of the Japanese Breast Cancer Society
Publication date
01-05-2008
Publisher
Springer-Verlag
Published in
Journal of Cancer Research and Clinical Oncology / Issue 5/2008
Print ISSN: 0171-5216
Electronic ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-007-0319-5

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