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Estudo fase I/II com capecitabina e radioterapia neoadjuvante em / pacientes com câncer de mama localmente avançado resistentes as / antraciclinas
Rio de Janeiro; s.n; 2006. xi,79 p. ilus.
Thesis in Portuguese, Portuguese, Portuguese | LILACS, ColecionaSUS, Inca | ID: biblio-930143
RESUMO
De acordo com dados do Instituto Nacional de Câncer do Brasil, quase 30% dos pacientes novos com câncer de mama apresentam no momento do diagnóstico, tumor localmente avançado, inoperável, sendo necessário tratamento primário com quimioterapia. Usualmente esquemas baseados em antraciclinas são efetivos, porém cerca de 30% dos tumores não responderão. Para estes pacientes ainda não existe uma segunda linha de tratamento estabelecida.

Objetivo:

Avaliar eficácia e toxicidade de radioterapia e capecitabina como segunda linha neo-adjuvante. Pacientes e

Métodos:

Vinte e oito pacientes com câncer de mama localmente avançados, refratários à quimioterapia primária com antraciclinas, foram estudados entre janeiro de 2003 e maio de 2004. Os pacientes receberam radioterapia (50Gy) e capecitabina (850mg/m2) duas vezes ao dia por 14 dias cada 3 semanas.

Resultados:

Vinte três de 28 pacientes (82%) tornaram se operáveis. Cinco pacientes não realizaram a cirurgia por progressão de doença. A mediana do tamanho do tumor por avaliação clínica reduziu de 80 cm² para 49cm². Doença residual microscópica foi observada em 3 pacientes (13%) e resposta patológica completa em um paciente. A mediana de linfonodos acometidos foi de dois. O tratamento foi bem tolerado, sem eventos grau 3 ou 4.

Conclusão:

Nossos resultados indicam que o tratamento de segunda linha neo-adjuvante com radioterapia e capecitabina em pacientes com câncer de mama localmente avançado e refratários a quimioterapia primária com antraciclinas, foi eficaz e bem tolerado. Estudo randomizado e prospectivo comparando radioterapia isolada e capecitabina combinada com radioterapia deverá ser realizado
ABSTRACT
According to data from Brazil’s National Cancer Institute, nearly 30% of the new patients who present with breast cancer have locally advanced disease. These patients are inoperable, and tumor reduction is usually attempted with chemotherapy. Firstline anthracyclin-based neoadjuvant chemotherapy is often effective, but about 30% of the patients fail. For those, there is yet no established second-line treatment.

Objectives:

We have studied the concomitant use of radiation therapy and capecitabine in this setting, in order to determine the toxicity and efficacy of this regimen as a second-line neoadjuvant treatment.

Methods:

Twenty-eight patients with inoperable locally advanced breast cancer refractory to first-line anthracycline based treatment were enrolled between January 2003 and May 2004. Patients received radiation therapy (50Gy) and concomitant capecitabine (850mg/m²) for 14 days every 3 weeks.

Results:

This treatment rendered 23 of the 28 patients (82%) operable. The five remaining patients did not undergo surgery due to disease progression. The median clinical tumor size decreased from 80 cm2 to 49 cm2. Microscopic residual disease was observed in 3 patients (13%), and another patient achieved a complete pathologic response. The median number of involved lymph nodes was two. Treatment was well tolerated, with no grade 3 or 4 events.

Conclusion:

Our data indicate that second-line neoadjuvant treatment with radiation therapy and capecitabine is feasible, well tolerated and effective in patients with locally advanced breast cancer refractory to primary anthracycline-based treatment. These results suggest that a randomized study should be done to compare radiotherapy alone to capecitabine combined with radiotherapy
Subject(s)

Full text: Available Index: LILACS (Americas) Main subject: Radiation-Sensitizing Agents / Breast Neoplasms / Neoadjuvant Therapy / Medical Oncology Type of study: Controlled clinical trial Limits: Female / Humans / Male Country/Region as subject: South America / Brazil Language: Portuguese Year: 2006 Type: Thesis

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Full text: Available Index: LILACS (Americas) Main subject: Radiation-Sensitizing Agents / Breast Neoplasms / Neoadjuvant Therapy / Medical Oncology Type of study: Controlled clinical trial Limits: Female / Humans / Male Country/Region as subject: South America / Brazil Language: Portuguese Year: 2006 Type: Thesis