title: [Gynecomastia secondary to Leydig cell tumor].
abstract: We describe a 16-year-old boy with Leydig cell tumor who initially presented bilateral gynecomastia with increased estradiol concentrations, decreased testosterone concentrations and normal gonadotropin levels. Testicular ultrasonography showed a tumor in the left testicle, and orchidectomy was performed. Histopathological analysis revealed a Leydig cell tumor. Two months after surgery, the gynecomastia diminished gradually and estrogen levels returned to normal. No recurrences have occurred during a 2-year follow-up.
authors.affiliation: Seccion de Endocrinología. Universidad Autónoma de Madrid. Departamento de Pediatría. Hospital Universitario Infantil del Niño Jesús. Madrid. España. leansor@teleline.es
authors.forename: L
authors.initials: L
authors.lastname: Soriano Guillén
authors.forename: J
authors.initials: J
authors.lastname: Pozo Román
authors.forename: M T
authors.initials: MT
authors.lastname: Muñoz Calvo
authors.forename: J
authors.initials: J
authors.lastname: Martínez Pérez
authors.forename: I
authors.initials: I
authors.lastname: de Prada Vicente
authors.forename: J
authors.initials: J
authors.lastname: Argente Oliver
mesh_terms: D000293:Adolescent; D006177:Gynecomastia / Q000209:etiology*; D006801:Humans; D007984:Leydig Cell Tumor / Q000150:complications*; D008297:Male; D013736:Testicular Neoplasms / Q000150:complications*