RESUMO
Resumen Introducción: A pesar de que el carcinoma de paratiroides es uno de los cánceres menos frecuentes del mundo, es importante tenerlo en cuenta al plantear el diagnóstico diferencial del hiperparatiroidismo primario, ya que su diagnóstico temprano tiene repercusiones en el tratamiento y el pronóstico vital del paciente. Caso Clínico: A continuación, se expone un caso clínico de un paciente con sintomatología abigarrada de hiperfunción paratiroidea que, dada la sospecha clínica de carcinoma de paratiroides y la no infiltración de estructuras adyacentes, fue tratado con una paratiroidectomía. Conclusión: Esta cirugía supone una menor morbilidad, sin suponer un detrimento para la supervivencia global del paciente.
Introduction: Parathyroid carcinoma should be taken into consideration among the differential diagnosis of primary hyperparathyroidism, even though it is one of the less common malignant tumours in the world, because an early diagnosis is essential for the treatment and the prognosis of the patient. Case Report: We present the case of a patient whose symptoms were compatible with hyperfunction of parathyroid gland. Due to the malignant disease suspicion and the non-invasion of adjacent tissue, he was treated with a parathyroidectomy. Conclusión: This type of treatment supposes a lower morbidity without decrease in overall survival, according to bibliography.
Assuntos
Humanos , Masculino , Adulto , Hormônio Paratireóideo/metabolismo , Neoplasias das Paratireoides/metabolismo , Metástase Linfática , Neoplasias das Paratireoides/patologia , Tireoidectomia , Tomografia Computadorizada por Raios X , Paratireoidectomia , UltrassonografiaRESUMO
Cholesterol mediates its proliferative and metastatic effects via the metabolite 27-hydroxycholesterol (27-HC), at least in breast and endometrial cancer. We determined the serum lipoprotein profile, intratumoral cholesterol and 27-HC levels in a cohort of patients with well-differentiated papillary thyroid carcinoma (PTC; low/intermediate and high risk), advanced thyroid cancers (poorly differentiated, PDTC and anaplastic thyroid carcinoma, ATC) and benign thyroid tumors, as well as the expression of genes involved in cholesterol metabolism. We investigated the gene expression profile, cellular proliferation, and migration in Nthy-ori 3.1 and CAL-62 cell lines loaded with human low-density lipoprotein (LDL). Patients with more aggressive tumors (high-risk PTC and PDTC/ATC) showed a decrease in blood LDL cholesterol and apolipoprotein B. These changes were associated with an increase in the expression of the thyroid's LDL receptor, whereas 3-hydroxy-3-methylglutaryl-CoA reductase and 25-hydroxycholesterol 7-alpha-hydroxylase were downregulated, with an intratumoral increase of the 27-HC metabolite. Furthermore, LDL promoted proliferation in both the Nthy-ori 3.1 and CAL-62 thyroid cellular models, but only in ATC cells was its cellular migration increased significantly. We conclude that cholesterol and intratumoral accumulation of 27-HC promote the aggressive behavior process of PTC. Targeting cholesterol metabolism could be a new therapeutic strategy in thyroid tumors with poor prognosis.
