title: Macrotestes associated with hyperprolactinemia.
abstract: Prolactin secreting pituitary adenomas are a rare finding in prepubertal children /1/. As in adults, their incidence is higher in girls than in boys; however, the macroadenomas are predominant in boys /20-16/. Two prepubertal boys who presented with short stature and linear growth deceleration were diagnosed to have prolactin secreting pituitary macroadenoma associated with growth hormone (GH) deficiency. They were treated with bromocryptine and exogenous recombinant hGH. They achieved a normal adult stature, full sexual maturation and tumor regression on the therapy. In addition, both boys developed macrotestes. Further evaluation ruled out other etiologies for macrotestes. We presume that the elevated prolactin caused local testicular growth factors to induce testicular cell division and/or hypertrophy resulting in an increased testicular volume.
authors.affiliation: Department of Pediatrics, University of Washington, Tacoma, USA.
authors.forename: R H
authors.initials: RH
authors.lastname: Ruvalcaba
authors.forename: M
authors.initials: M
authors.lastname: Castro-Magana
authors.forename: M
authors.initials: M
authors.lastname: Angulo
mesh_terms: D000293:Adolescent; D001971:Bromocriptine / Q000627:therapeutic use; D019382:Human Growth Hormone / Q000627:therapeutic use; D006801:Humans; D006966:Hyperprolactinemia / Q000473:pathology*; D008297:Male; D010911:Pituitary Neoplasms / Q000188:drug therapy / Q000473:pathology*; D015175:Prolactinoma / Q000188:drug therapy / Q000473:pathology*; D011994:Recombinant Proteins / Q000627:therapeutic use; D013737:Testis / Q000473:pathology*
chemical_list: D011994:Recombinant Proteins; D019382:Human Growth Hormone; D001971:Bromocriptine