Changing the molecular profile of primary and metastatic breast cancer identified by Foundation One: case report

Objective: To describe a case report of a patient who presented with bilateral breast cancer with progression to metastatic disease, in which immunohistochemical profile of the primary and metastatic tumor was divergent. Methods: This was a study with a descriptive narrative and reflective design, of the case report type, based on secondary data, with information and images obtained from the electronic medical records of the MVSoul system used in the oncology center of a private hospital in the Federal District in Brazil. Data collection was derived from the analysis of data and images of the electronic medical record. Case report: A patient presented with bilateral metastatic breast cancer, and the primary and metastatic breast tumors showed a difference in immunohistochemical profile. Accordingly, we highlight the rarity of the case, the need for biopsies of metastatic lesions because of the molecular heterogeneity of breast cancer and possible discrepancy between the primary tumor and metastases. Spreading knowledge about diagnostic tests and personalized treatment according to tumor molecular characteristics is also essential, especially when the patient does not have a satisfactory therapeutic response, as in the reported case, since the patient had metastases with different molecular profiles confirmed only by of tumor DNA sequencing.

Expressão citofotométrica dos marcadores tumorais Ki-67 e CD34 no adenocarcinoma de estômago / Citophotometric expression of tumoral markers: Ki67 and CD34 in stomach adenocarcinoma

RACIONAL: O câncer de estômago ocupa o terceiro lugar das neoplasias malignas em todo o mundo e é a segunda causa de morte por câncer. No entanto, sua incidência está em declínio nos últimos anos, principalmente em paises como Estados Unidos, Inglaterra e Austrália, assim como onde a sua incidência sempre foi alta - Japão, China, Coréia e Leste da Ásia -, com estimativa de 780 casos anuais por 100 mil habitantes. OBEJTIVOS: Descrição da expressão citofotométrica dos marcadores Ki-67 e CD34 e comparação entre a expressão deles no adenocarcinoma de estômago. MÉTODOS: Foram selecionados inicialmente 60 blocos com espécime de adenocarcinoma gástrico coletados nos serviços de patologia do Hospital do Gama - Brasília, DF e Hospital Dom Orione - Araguaina,TO. A imunoistoquímica com os marcadores Ki-67 e CD34 foi feita no Laboratório de Citologia e Histopalogia Ltda - CITOLAB, Curitiba, PR. Foram aproveitados do total 35 blocos para o estudo histológico e imunoistoquímico que foram analisados pelo sistema de citometria de imagem computarizado SAMBA 4000 no Instituto de Pesquisas Médicas do Hospital Universitário Evangélico de Curitiba. Foram estudados o índice de marcagem e a densidade óptica para ambos os marcadores analisados separadamente e depois comparados. RESULTADOS: Das 35 lâminas, 15 (42,85%) marcaram o Ki-67; 26 (74,28%) o CD34 e 12 lâminas (34,28%) marcaram com os dois marcadores. Quando se comparou o índice de marcagem entre Ki-67 e CD34, observou-se que existe diferença significativa (P<0,001) a favor do CD34. Quando se comparou a densidade óptica entre ambos, observou-se que existe diferença significativa (P<0,001) a favor do CD34. CONCLUSÕES: A média do índice de marcagem do marcador Ki-67 foi de 36,85%, e a da densidade óptica de 29,33 pixels. O CD34 teve como índice de marcagem 84,86% e 49,84 pixels de média para a densidade óptica. Quando se comparou o índice de marcagem entre ambos, observou-se que existe diferença significativa a favor do CD34. Quando se comparou a densidade óptica entre ambos também observou-se que existe diferença significativa a favor do CD34.

BACKGROUND: Stomach cancer is rated as the third malignant neoplasm in the world, being the second most frequent cause of death. However, its incidence has been declining in the last few years in countries like the United States, England and Australia, and in countries where its incidence has always been high - Japan, China, Korea and in the Eastern part of Asia, which has an estimated 780 cases per year per 100,000 inhabitants. AIM: To describe the cytophotometric expression of Ki-67 and CD-34 with comparison to their expression in stomach adenocarcinomas. METHODS: 60 paraffin blocks containing specimens of gastric adenocarcinomas, were initially selected in the Pathology services of the Gama Hospital - Brasília, DF an at the Dom Orione Hospital - Araguaiana, TO. The immunohistochemistry process using Ki-67 and CD-34 was performed at the Laboratório de Citologia e Histopatologia Ltda. -CITOLAB, Curitiba, PR. A total of 35 paraffin blocks were selected among the other 60 previously selected, being used in histological studies as well as for the immunohistochemistry process. These were analyzed using the computerized image cytophotometric system (SAMBA 4000) at the Institute of Medical Research of the Hospital Universitário Evangélico de Curitiba. The parameters studies and analyzed through this system were the labeling index and optical density for both of the tumoral markers being independently analyzed and latter compared with each other. RESULTS: Of the 35 slides, 15(42,85%) showed the expression of Ki-67; 26 (74,28%) of CD-34 and 12 slides (34,28%) showed the expression of both markers. When the labeling indexes between Ki-67 and CD-34 were compared, a significant difference was observed (P<0,001) favoring CD-34. When the optical density of the two markers was compared, a significant difference (P<0,001) was also observed, favoring CD-34. CONCLUSIONS: The average labeling index for Ki-67 was of 36,85%, where as the optical density was of 29,33 pixels. CD-34 showed a labeling index of 84,86% and an average 49,84 pixels regarding the optical density. When the labeling index and optical density were compared between both of the markers, a significant difference was established favoring CD-34 in both of the parameters analyzed.