Breast cancer research and treatment
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Breast Cancer Res. Treat. · Jan 1996
Variation in staging and treatment of local and regional breast cancer in the elderly.
Few studies of practice variation in the management of early breast cancer for elderly women have examined the process of care in depth. This study evaluated the effects of age and other factors on surgical staging techniques and treatment. ⋯ Younger age was most consistently associated with staging and the use of chemotherapy in this cohort of elderly breast cancer patients. Based on the reported initial treatment plan, hormonal therapy was infrequently used and information from axillary lymph node assessment was used to stratify treatment. Although the low use of adjuvant hormonal therapy in elderly women may compromise survival, neither comorbid nor socioeconomic factors as measured in this study explained this practice pattern.
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Breast Cancer Res. Treat. · Jan 1996
Time distribution of the recurrence risk for breast cancer patients undergoing mastectomy: further support about the concept of tumor dormancy.
To gather information on metastatic growth from the time-distribution of first treatment failure in breast cancer patients undergoing mastectomy alone. ⋯ The multipeak hazard curve suggests that the process resulting in overt clinical metastases may have discrete features. Primary tumor size could affect in different ways early and late metastases, while axillary node status should be related to the risk level, not to the risk pattern, and menopausal status does not seem to significantly affect the hazard distribution. Moreover, contralateral breast tumors, occurring at constant risk throughout the time, should be considered as second primary cancers. These findings could be reasonably explained by a tumor dormancy hypothesis, which assumes that micrometastases may be in different biological steady states, most of which do not imply tumor growth. Tumor or microenvironment changes could induce metastatic growth after given mean transition times from surgery and originate a discrete pattern of the hazard function.
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Breast Cancer Res. Treat. · Jan 1996
High-dose chemotherapy with autologous stem cell rescue in breast cancer.
Because metastatic breast cancer is a lethal disease despite some responsiveness to systemic chemotherapy, high-dose chemotherapy with autologous stem cell rescue is being utilized with increasing frequency. This analysis was undertaken to determine the outcome for such patients treated with intensive chemotherapy between 1989-1994, at the Hoag Cancer Center in Newport Beach, CA. ⋯ Modifications made in the program, including selection of patients responsive to induction chemotherapy, transfusion of peripheral blood stem cells, implementation of hematopoietic colony stimulating factors, and use of tandem intensive treatments has been associated with a low rate of acute morbidity and encouraging survival rates.