La importancia de la determinación del HER2 en el cáncer gástrico avanzado: a propósito de un caso clínico / Importance of HER2 status determination in advanced gastric cancer: A case study
Abstract Advanced gastric cancer (AGC) is an entity that encompasses two distinct clinical situations locally advanced unresectable gastric cancer and metastatic disease, with chemotherapy as the standard treatment. HER2 overexpression can occur in 9% to 38% of the cases with this disease and has been the first predictive biomarker used for trastuzumab-targeted therapy in patients with advanced gastric and gastroesophageal tumors. This article presents a patient with AGC and positive HER2 treated with conventional chemotherapy plus trastuzumab as targeted therapy with adequate clinical response.