RESUMO
Although selective estrogen receptor modulators (SERMs), such as tamoxifen, or aromatase inhibitors (AIs), such as anastrozole, are the preferred endocrine treatment approach for most patients with hormone receptor-positive breast cancer, many patients progress despite this therapy or become resistant. Fulvestrant is a selective estrogen receptor down-regulator (SERD) that has demonstrated activity and efficacy in patients with hormone receptor-positive breast cancer previously untreated or treated with hormonal therapy. The efficacy of fulvestrant has been demonstrated in the neoadjuvant and metastatic settings, either alone or in combination with other therapies such as anastrozole or targeted drugs. Additionally, 500 mg of fulvestrant have been shown to be more effective than 250 mg, without significant differences in the toxicity profile. In this review, the unique mode of action of fulvestrant and the clinical data for different dosing regimens both alone or in combination with other drugs is critically assessed.
Assuntos
Neoplasias da Mama , Estradiol/análogos & derivados , Receptores de Estrogênio/metabolismo , Antineoplásicos Hormonais/farmacologia , Antineoplásicos Hormonais/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/metabolismo , Relação Dose-Resposta a Droga , Estradiol/farmacologia , Estradiol/uso terapêutico , Antagonistas do Receptor de Estrogênio/farmacologia , Antagonistas do Receptor de Estrogênio/uso terapêutico , Feminino , Fulvestranto , Humanos , Avaliação de Resultados em Cuidados de Saúde , Moduladores Seletivos de Receptor Estrogênico/uso terapêuticoRESUMO
Las metástasis en mama desde tumores primarios extramamarios suponen el 2% de todos los tumores malignos de la mama (linfomas y melanomas malignos son los más frecuentes), y pueden simular tumores primarios tanto clínica como radiológicamente. El pronóstico de pacientes con metástasis de mama de tumores sólidos en general es malo (el 80% mueren antes de un año). El tratamiento más aceptado es la escisión simple, por lo que conocer, previamente a la cirugía, la procedencia metastásica del nódulo impedirá una cirugía demasiado agresiva que no va a mejorar el pronóstico. Presentamos un caso de metástasis de mama de un melanoma maligno cutáneo diagnosticado en piel de costado derecho (extirpado 3 años antes) (AU)
Breast metastases from extramammary primary tumors account for 2% of all malignant breast tumors (the most common being lymphoma and malignant melanoma) and can mimic primary breast carcinoma clinically and radiologically. The prognosis of patients with metastases to the breast from solid tumors is generally poor, with 80% dying in the first year. The most widely accepted treatment is simple excision. Consequently, determining the source of metastases prior to surgery avoids further surgical procedures that will not improve prognosis. We present a case of metastases from malignant cutaneous melanoma to the breast diagnosed in the right thoracic wall and surgically excised 3 years previously (AU)
