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Home: Oncology Leader Commentary: J. Michael Dixon, MD

Click on the topic below for comments by Dr J. Michael Dixon to comment on. You will also find links to related articles and clinical trials.

Breast cysts as a cancer risk factor
Biochemistry of breast cysts
Intratumoral estrogen levels in breast cancer
Neoadjuvant endocrine therapy
Response rates with neoadjuvant endocrine therapy
Time to response with neoadjuvant endocrine therapy
Randomized trials of neoadjuvant Arimidex
Response criteria with neoadjuvant therapy
Biologic effect of endocrine agents
Combining endocrine agents
Quality of life with neoadjuvant endocrine therapy
Neoadjuvant endocrine therapy of locally advanced breast cancer
Neoadjuvant therapy of inflammatory breast cancer
Neoadjuvant therapy of elderly patients
Timing of surgery after neoadjuvant therapy
Neoadjuvant therapy with aromatase inhibitors

Response criteria with neoadjuvant therapy

Play Audio Below:

Dr. Dixon: One of the things you can look at – a very sensitive endpoint – is the percentage reduction in volume. So rather than just response, if you look at the percentage reduction in volume that allows you a much greater ability to detect differences between drugs than the standard: response, no response. Because if you think about it, you’ve got a 49% reduction partial response; if you got 49%, you got no change. If there’s a 51%, it’s a partial response. It’s a very artificial cut-off.

Dr. Love: So the volume is more quantitative?

Dr. Dixon: Yes, this is more quantitative, it is more reproducible and you got hard copy because you got ultrasound or mammographic images and it allows you external people to come out and review it and say, "Well, these guys are right on this combination."

Relevant Articles:

Combined modality treatment of locally advanced breast carcinoma in elderly patients or patients with severe comorbid conditions using tamoxifen as the primary therapy.
Hoff PM. Valero V. Buzdar AU. Singletary SE. Theriault RL. Booser D. Asmar L. Frye D. McNeese MD. Hortobagyi GN. Cancer. 88(9):2054-60, 2000.

Biologic markers as predictors of clinical outcome from systemic therapy for primary operable breast cancer.
Chang J. Powles TJ. Allred DC. Ashley SE. Clark GM. Makris A. Assersohn L. Gregory RK. Osborne CK. Dowsett M. Journal of Clinical Oncology. 17(10):3058-63, 1999.

Primary chemotherapy or hormonotherapy for patients with breast cancer. [Review]
Brain EG. Misset JL. Rouess J. Primary chemotherapy or hormonotherapy for patients with breast cancer. [Review] Cancer Treatment Reviews. 25(4):187-97, 1999.

Reduction in angiogenesis after neoadjuvant chemoendocrine therapy in patients with operable breast carcinoma.
Makris A. Powles TJ. Kakolyris S. Dowsett M. Ashley SE. Harris AL.. Cancer. 85(9):1996-2000, 1999.

Prognostic relevance of cerbB2 expression following neoadjuvant chemotherapy in patients in a randomised trial of neoadjuvant versus adjuvant chemoendocrine therapy.
Gregory RK. Powles TJ. Salter J. Chang JC. Ashley S. Dowsett M. Breast Cancer Research & Treatment. 59(2):171-5, 2000.

The primary use of endocrine therapies. [Review]
Howell A. Anderson E. Blamey R. Clarke RB. Dixon JM. Dowsett M. Johnston SR. Miller WR. Nicholson R. Robertson JF. Recent Results in Cancer Research. 152:227-44, 1998.

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