Antonio Carlos Buzaid

Hospital Sirio Libanes, Potengy, Rio Grande do Norte, Brazil

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Publications (5)15.54 Total impact

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    ABSTRACT: The BCRF II study presents a systematic review of the norms, recommendations and guidelines that are considered medical care standards (MCS) for breast cancer in 12 Latin American and Caribbean countries. Three key questions from the BCRF I survey data on early detection and diagnosis are presented to identify implementation practice patterns related to MCS. Information related to MCS was requested from governmental health authorities, cancer institutes, and national scientific and professional societies in 12 Latin American and Caribbean countries. Documents received were reviewed by breast cancer experts from each respective country. Three key survey questions from the BCRF I survey on early detection and diagnosis were reprocessed to provide information related to implementation practice of existing MCS. Results: All countries included in the BCRF II study had medical care standards (MCS) whether published by governmental authorities, national professional or scientific associations, cancer institutes, or adoption of international MCS. Experts reported different practice patterns at a Country level versus a Center level. Overall, 85% of the experts reported that less than 50% of the women with no symptoms undergo a mammography at the Country level compared to 43% at the Center level. For diagnostic suspicion of breast cancer, 80% of experts considered the diagnostic suspicion at a Country level to come from the patient compared to 50% at a Center level. About 30% of patients waited for more than 3 months for a diagnosis at the Country level compared to 7% at the Center level. All the Latin America and Caribbean countries in the study reported the use of similar MCS for breast cancer care. The reported difference between care practiced at a Country level versus a Center level suggests the challenge is not in generating new MCS, but in implementing policies and control mechanisms for compliance with existing MCS, guaranteeing their applicability to all populations.
    Breast (Edinburgh, Scotland) 11/2009; 19(1):50-4. · 2.09 Impact Factor
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    ABSTRACT: The objective of this study was to evaluate the long-term outcomes of a single institution, Hospital Sírio-Libanes in São Paulo, Brazil, regarding the treatment of peritoneal carcinomatosis. Between October 2002 and October 2006, 46 consecutive patients were treated with radical cytoreduction and hyperthermic peritoneal chemotherapy. There were 21 patients with peritoneal surface malignancy (PSM) from colorectal origin (among whom 8 had an appendiceal primary), 15 with ovarian carcinomas, 2 with primary peritoneal mesotheliomas, and 8 with other cancers. The median age was 49 years (range 18-77 years). All patients were followed for a median of 20 months. Demographic data, tumor histology, the peritoneal carcinomatosis index (PCI), operative procedures (extension of resection, lymphadenectomy), and hyperthermic intraperitoneal chemotherapy (HIPEC) characteristics (drugs, temperature, duration) were prospectively recorded. Perioperative mortality and morbidity and the long-term outcome were assessed. Complete cytoreduction was achieved in 45 patients. The median PCI was 11, and the mean operating time was 17 h. There were no procedure-related deaths, but major morbidity was observed in 52% and included fistulas, abscesses, and hematologic complications. The overall Kaplan-Meier 4-year estimated survival was 56%. Among patients with PSM from colorectal carcinoma, the estimated 3-year survival was 70%. Nine (42%) patients had a recurrence, three with peritoneal disease. The median disease-free-interval was 16 months. The ovarian cancer patients had an estimated 4-year survival rate of 75% and median disease-free survival duration of 21 months. Cytoreductive surgery with HIPEC may improve survival of selected patients with peritoneal carcinomatosis, with acceptable morbidity.
    World Journal of Surgery 02/2009; 33(4):835-9; discussion 840. · 2.23 Impact Factor
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    ABSTRACT: Renal cell carcinoma represents nearly 3% of all cancers, predominantly affecting individuals >or=50 years of age, and until recently, few treatments options were available for metastatic disease. The 5-year median survival for these patients with metastatic renal cell carcinoma has been estimated at <10%. This review explores the data of the most relevant trials focusing on new approaches with novel agents, including sunitinib, sorafenib, bevacizumab, temsirolimus, as well as their combinations with traditional agents. We describe mechanisms of action, activity, and toxicity profile of those agents, as well as administration schedules that have been studied in clinical trials.
    Cancer Treatment Reviews 10/2008; 34(8):750-60. · 6.02 Impact Factor
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    ABSTRACT: The incidence of breast cancer in Latin American countries is lower than that in more developed countries, whereas the mortality rate is higher. These differences probably are related to differences in screening strategies and access to treatment. Population-based data are needed to make informed decisions. A 65-question telephone survey that included 100 breast cancer experts from 12 Latin American countries was conducted in 2006 as an exploratory analysis of the current state of breast cancer treatment in these regions at both at the country level and at the center level. Greater than 90% of countries had no national law or guideline for mammography screening. The access rate to mammography was 66.3% at the country level and 47% at the center level. Variation in care based on level (country vs center) was indicated for the timing of treatment after diagnosis, timing from initial diagnosis to treatment, and the time from surgery to initial chemotherapy. However, the more sophisticated diagnostic testing for hormone receptors and biomarkers were available at most centers (>80%), and, overall, nearly 80% of patients started treatment within 3 months of diagnosis. Variation in care between breast cancer care at the center level versus the country level indicated a need for national cancer care programs. Alternative data collection strategies for understanding the state of breast cancer control programs in developing countries can help identify areas of improvement.
    Cancer 10/2008; 113(8 Suppl):2359-65. · 5.20 Impact Factor
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    ABSTRACT: Acinar cell carcinoma of the pancreas is a rare tumor for which the best chemotherapy regimen has not been clearly established. Here, we report on a female patient with an unusually long survival and a remarkable response to weekly paclitaxel. To our knowledge, this is the first time that paclitaxel has been associated with an objective response in this disease. The patient recurred after initial resection and failed multiple prior chemotherapeutic regimens. She received weekly paclitaxel at 80 mg/m2 and responded after eight doses, maintaining controlled disease for a total of 4 mo. We present her case in detail and review the available literature regarding this rare type of tumor.
    International Journal of Gastrointestinal Cancer 02/2003; 34(2-3):67-72.