RESUMO
In type 1 endometrial cancer, unopposed estrogen stimulation is thought to lead to endometrial hyperplasia which precedes malignant progression. Recent data from our group and others suggest that ALDH activity mediates stemness in endometrial cancer, but while aldehyde dehydrogenase 1 (ALDH1) has been suggested as a putative cancer stem cell marker in several cancer types, its clinical and prognostic value in endometrial cancer remains debated. The aim of this study was to investigate the clinical value of ALDH1 expression in endometrial hyperplasia and to determine its ability to predict progression to endometrial cancer. Interrogation of the TCGA database revealed upregulation of several isoforms in endometrial cancer, of which the ALDH1 isoforms collectively constituted the largest group. To translate its expression, a tissue microarray was previously constructed which contained a wide sampling of benign and malignant endometrial samples. The array contained a metachronous cohort of samples from individuals who either developed or did not develop endometrial cancer. Immunohistochemical staining was used to determine the intensity and frequency of ALDH1 expression. While benign proliferative and secretory endometrium showed very low levels of ALDH1, slightly higher expression was observed within the stratum basalis. In disease progression, cytoplasmic ALDH1 expression showed a step-wise increase between endometrial hyperplasia, atypical hyperplasia, and endometrial cancer. ALDH1 was also shown to be an early predictor of EC development, suggesting that it can serve as an independent prognostic indicator of patients with endometrial hyperplasia with or without atypia who would progress to cancer (p = 0.012).
Assuntos
Família Aldeído Desidrogenase 1/genética , Biomarcadores Tumorais/genética , Hiperplasia Endometrial/genética , Neoplasias do Endométrio/genética , Regulação Neoplásica da Expressão Gênica , Lesões Pré-Cancerosas/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Família Aldeído Desidrogenase 1/metabolismo , Biomarcadores Tumorais/metabolismo , Linhagem Celular Tumoral , Progressão da Doença , Hiperplasia Endometrial/enzimologia , Hiperplasia Endometrial/patologia , Neoplasias do Endométrio/enzimologia , Neoplasias do Endométrio/patologia , Feminino , Humanos , Estimativa de Kaplan-Meier , Pessoa de Meia-Idade , Lesões Pré-Cancerosas/enzimologia , Lesões Pré-Cancerosas/patologia , PrognósticoRESUMO
The presentation of a cardiac hamartoma, an exceedingly rare and histologically benign cardiac tumor, can be variable. We describe a case of refractory ventricular tachycardia in a patient with a cardiac mass failing multiple pharmacologic and procedural interventions, ultimately treated by cardiac transplantation and diagnosed with a mesenchymal cardiac hamartoma. (Level of Difficulty: Intermediate.).