title: [Ectopic parathyroid adenoma].
abstract: Ectopic parathyroid adenoma is a rare cause of primary hyperparathyroidism and can become a diagnostic challenge. We present a case report of an ectopic mediastinal parathyroid adenoma leading to primary hyperparathyroidism and responsible for a persistent asymptomatic hypercalcemia. The preoperative location of the tumor assessed by imaging studies contribute to the choice of the surgical cervical approach. Tumor resection was successful and the calcemia levels promptly returned to normal levels.
authors.affiliation: Serviços de Medicina 1.4 e de Radiologia do Hospital de S. José e Serviço de Cirurgia Cardio-Torácica do Hospital de Santa Marta, Centro Hospitalar Lisboa Centro, Portugal.
authors.forename: Inês
authors.initials: I
authors.lastname: Simões
authors.forename: Isabel
authors.initials: I
authors.lastname: Marcão
authors.forename: Elisabette
authors.initials: E
authors.lastname: Alves
authors.forename: João
authors.initials: J
authors.lastname: Reis
authors.forename: Fernando
authors.initials: F
authors.lastname: Martelo
mesh_terms: D000236:Adenoma / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D000368:Aged; D006801:Humans; D049950:Hyperparathyroidism, Primary / Q000209:etiology / Q000601:surgery; D008297:Male; D008479:Mediastinal Neoplasms / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D010282:Parathyroid Neoplasms / Q000150:complications / Q000175:diagnosis / Q000601:surgery