Efectividad y perfil de toxicidad de pertuzumab en combinación con trastuzumab y taxano en pacientes con cáncer de mama metastásico HER2 positivas tratadas en los hospitales Calderón Guardia, México, San Juan de Dios, Max Peralta y San Vicente de Paul de la CCSS en el periodo 2015 al 2021
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Khanna Jiménez, Priyanka
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Abstract
Marco teórico:
La primera línea de tratamiento para cáncer de mama metastásico HER2-positivo es la combinación de
pertuzumab, trastuzumab y taxanos. Desde el 2014 en Costa Rica se empezó a utilizar este esquema en la
seguridad social; sin embargo, su impacto aún no se ha evaluado debido a que, a nuestro conocimiento, no
se han realizado estudios que reporten su efectividad en esta población. Este trabajo pretende evaluar el
desempeño de este tratamiento en la seguridad social.
Métodos:
Se incluyeron un total de 148 pacientes con un diagnóstico histológico confirmado de cáncer de mama
metastásico HER2-positivo que recibieron pertuzumab, trastuzumab y taxano (paclitaxel o docetaxel) como
primera línea de tratamiento en el periodo agosto 2015 a agosto 2021.
Resultados:
La mediana de edad fue 58 años, 81% de las pacientes tenían un ECOG de 0, 54% tenían receptor de
hormonas positivo, 90% recibieron tratamiento citotóxico neoadyuvante o adyuvante, y 42% tenían
enfermedad metastásica visceral, incluyendo cerebro. El taxano más frecuentemente utilizado fue paclitaxel,
con un promedio de 16 ciclos semanales recibidos, y recibieron la combinación de pertuzumab y trastuzumab
en promedio por un periodo de 22.7 meses. El motivo más frecuente de suspensión fue progresión (56.1%)
y 3.4% fue a causa de toxicidad; 3.4% de los pacientes abandonaron el tratamiento. Los eventos adversos
más frecuentes fueron neuropatía periférica (34%), diarrea (21%), neutropenia febril (1%), y cardiotoxicidad
grado 3 fue documentada en 2 pacientes. El cerebro fue el sitio de progresión más frecuente (38.5%). Con
una mediana de seguimiento de 27.5 meses, se obtuvo una supervivencia libre de progresión de 19 meses
(95% CI 15-25) y una mediana de supervivencia global de 73 meses (95% CI 38-74).
Conclusiones:
Al conocimiento actual, este podría ser el primer estudio realizado a nivel de Centroamérica que nos permite
obtener evidencia de vida real de que la eficacia de la combinación de pertuzumab, trastuzumab y taxano
en una primera línea de tratamiento es similar a lo demostrado en los estudios pivotales.
Background: The first line of treatment for HER2-positive metastatic breast cancer is the combination of pertuzumab, trastuzumab and taxanes. In Costa Rica, since 2014, this combination began to be used in the national health care system, however, to the current knowledge, its impact was not yet known no local studies that had been reported showing its effectiveness. The present study aimed to assess the performance of this treatment in our public health care system. Methods: In this study a total of 148 patients were included, with a confirmed histological diagnosis of HER2-positive metastatic breast cancer, who received pertuzumab, trastuzumab, and taxane (paclitaxel or docetaxel) as first-line treatment from August 2015 to August 2021. Results: The median age was 58 years, 81% of patients had ECOG 0, 54% were hormone receptor positive, 90% received adjuvant or neoadjuvant chemotherapy, and 42% had metastatic visceral disease, including the brain. Paclitaxel was the most frequently used taxane with an average of 16 weekly cycles, and the median duration of pertuzumab and trastuzumab together was 22.7 months. The most frequent reason for suspension was progression (56.1%) and only 3.4% due to toxicity; 3.4% of the patients abandoned treatment. The most frequent adverse events were peripheral neuropathy (34%), diarrhea (21%), febrile neutropenia (1%), and grade 3 cardiotoxicity was seen in 2 patients. The most frequent site of progression during treatment was the brain (38.5%). With a median follow-up of 27.5 months, progression-free survival was 19 months (95% CI 15-25) and a median overall survival of 73 months (95% CI 38-74). Conclusions: To the current knowledge, this could be the first study carried out in Central America that allows us to obtain real world evidence that the efficacy of the combination of pertuzumab, trastuzumab and taxane in a first line of treatment is similar to that demonstrated in studies pivotal.
Background: The first line of treatment for HER2-positive metastatic breast cancer is the combination of pertuzumab, trastuzumab and taxanes. In Costa Rica, since 2014, this combination began to be used in the national health care system, however, to the current knowledge, its impact was not yet known no local studies that had been reported showing its effectiveness. The present study aimed to assess the performance of this treatment in our public health care system. Methods: In this study a total of 148 patients were included, with a confirmed histological diagnosis of HER2-positive metastatic breast cancer, who received pertuzumab, trastuzumab, and taxane (paclitaxel or docetaxel) as first-line treatment from August 2015 to August 2021. Results: The median age was 58 years, 81% of patients had ECOG 0, 54% were hormone receptor positive, 90% received adjuvant or neoadjuvant chemotherapy, and 42% had metastatic visceral disease, including the brain. Paclitaxel was the most frequently used taxane with an average of 16 weekly cycles, and the median duration of pertuzumab and trastuzumab together was 22.7 months. The most frequent reason for suspension was progression (56.1%) and only 3.4% due to toxicity; 3.4% of the patients abandoned treatment. The most frequent adverse events were peripheral neuropathy (34%), diarrhea (21%), febrile neutropenia (1%), and grade 3 cardiotoxicity was seen in 2 patients. The most frequent site of progression during treatment was the brain (38.5%). With a median follow-up of 27.5 months, progression-free survival was 19 months (95% CI 15-25) and a median overall survival of 73 months (95% CI 38-74). Conclusions: To the current knowledge, this could be the first study carried out in Central America that allows us to obtain real world evidence that the efficacy of the combination of pertuzumab, trastuzumab and taxane in a first line of treatment is similar to that demonstrated in studies pivotal.
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Cáncer de mama metastásico, HER2-positivo, TRATAMIENTO MÉDICO, SEGURIDAD SOCIAL
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