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1.
Can J Surg ; 62(5): 358-360, 2019 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-31550104

RESUMEN

Summary: The management of high-risk benign breast disease (BBD) is changing because of improvements in radiological and pathological analysis. We sought to determine the current practice recommendations of breast health professionals in managing patients with high-risk BBD. We surveyed members of the Canadian Society of Surgical Oncology, Canadian Association of General Surgeons and Canadian Association of Radiologists. The survey contained demographic and case-based questions concerning management of high-risk benign breast lesions. Participants were asked for their recommendations and opinions regarding future risk of breast cancer as well as the role of chemoprevention. There was no consistency among the 41 respondents in the treatment recommendations for any of the high-risk benign conditions, and the lifetime risk associated with classic lobular carcinoma in situ was vastly underestimated. Education and evidenced-based guidelines are urgently needed to ensure more uniform practice nationally.


Asunto(s)
Neoplasias de la Mama/prevención & control , Oncología Médica/normas , Médicos/estadística & datos numéricos , Guías de Práctica Clínica como Asunto , Lesiones Precancerosas/terapia , Anticarcinógenos/normas , Anticarcinógenos/uso terapéutico , Biopsia/normas , Mama/diagnóstico por imagen , Mama/patología , Mama/cirugía , Neoplasias de la Mama/patología , Canadá , Femenino , Humanos , Mamografía/normas , Mastectomía Segmentaria/métodos , Mastectomía Segmentaria/normas , Oncología Médica/métodos , Médicos/normas , Lesiones Precancerosas/diagnóstico , Lesiones Precancerosas/patología , Encuestas y Cuestionarios/estadística & datos numéricos
3.
Int J Toxicol ; 26(3): 253-9, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-17564907

RESUMEN

"Avemar pulvis" is a powder consisting of an aqueous extract of fermented wheat germ, with the drying aids maltodextrin and silicon dioxide, standardized to contain approximately 200 microg/g of the natural constituent 2,6-dimethoxy-p-benzoquinone. The results of toxicological and clinical studies of this product demonstrate its safety for its intended use as a dietary supplement ingredient in the United States. Avemar pulvis has been used in Hungary since 1998 and is approved in that country, as well as in the Czech Republic, Bulgaria, and Romania, as a "medical nutriment for cancer patients." Acute and subacute toxicity studies using rodents orally administered Avemar pulvis showed that dose levels (2000 to 3000 mg/kg body weight [bw]/day) exceeding the normal recommended oral dosage (8.5 g/day or 121 mg/kg bw/day for a 70-kg individual) by up to approximately 25-fold caused no adverse effects. The test substance showed no evidence of mutagenicity or genotoxicity in vitro or in vivo. Clinical studies using Avemar pulvis as a supplement to drug therapy in cancer patients at doses of 8.5 g/day not only showed no evidence of toxicity, but also showed a reduction in the side effects of chemotherapy. Overall, it was concluded that Avemar pulvis would not be expected to cause adverse effects under the conditions of its intended use as an ingredient in dietary supplements.


Asunto(s)
Anticarcinógenos , Suplementos Dietéticos , Extractos Vegetales , Pruebas de Toxicidad/métodos , Triticum/química , Animales , Anticarcinógenos/normas , Anticarcinógenos/uso terapéutico , Anticarcinógenos/toxicidad , Benzoquinonas/análisis , Benzoquinonas/normas , Células CHO , Ensayos Clínicos como Asunto , Seguridad de Productos para el Consumidor , Cricetinae , Cricetulus , Fragmentación del ADN/efectos de los fármacos , Suplementos Dietéticos/normas , Suplementos Dietéticos/toxicidad , Femenino , Dosificación Letal Mediana , Masculino , Ratones , Ratones Endogámicos , Neoplasias/prevención & control , Nivel sin Efectos Adversos Observados , Extractos Vegetales/normas , Extractos Vegetales/uso terapéutico , Extractos Vegetales/toxicidad , Ratas , Ratas Endogámicas F344 , Ratas Wistar
4.
Cad Saude Publica ; 14(3): 613-6, 1998.
Artículo en Portugués | MEDLINE | ID: mdl-9761615

RESUMEN

Marketing of medicinal plants and phytotherapeutic products is spreading all over the world. In order to assess the commercialization of medicinal plants and phytotherapeutic products in the State of Minas Gerais, we identified and tested for the presence of adulterants and active ingredients in 27 samples of chamomile. All the samples consisted of Matricaria recutita flowers, but they were badly fragmented, a result of excessive handling and poor preservation. All samples contained contaminants, and insects were observed in 63% of the samples sold in drugstores. Only 50% of the samples in each group had the essential oils needed to produce antiinflammatory activity. Flavonoids and other phenolic constituents with a spasmolytic effect were detected in only 20% of the samples from each group. Results with chamomile indicated the poor quality with which medicinal plants and phytotherapeutic products are marketed and confirm the need for surveillance of such products in Brazil.


Asunto(s)
Anticarcinógenos/normas , Inhibidores Enzimáticos/normas , Flavonoides/normas , Hialuronoglucosaminidasa/antagonistas & inhibidores , Aceites Volátiles/normas , Fitoterapia , Brasil , Manzanilla , Contaminación de Medicamentos/prevención & control , Plantas Medicinales , Vigilancia de Productos Comercializados
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