title: Aggressive prolactinoma in a child related to germline mutation in the ARYL hydrocarbon receptor interacting protein (AIP) gene.
abstract: The objective of this study was to describe a familial screening for AIP mutations in the context of aggressive prolactinoma in childhood. A 12-year-old boy, presented headaches and bilateral hemianopsia. He had adequate height and weight for his age (50(th) percentile), Tanner stage G1 P1. His bone age was 10 years. Prolactin was 10.560 ng/mL (3-25), FSH and LH were undetectable, IGF-1, TSH, Free T4, ACTH, and cortisol were within normal ranges. MRI showed a pituitary macroadenoma, 5.3 X 4.0 X 3.5 cm with compression of the optic chiasm, bilateral cavernous sinus invasion, encasement of carotids, and extension to clivus. Surgical debulking was performed. Resistance to cabergoline was characterized and he was submitted to two surgeries and radiotherapy. Immunohistochemical evaluation included prolactin, ACTH, GH, FSH, LH,AIP, c-erb B2, Ki-67, and p53. Genomic DNA was isolated from the index case and 48 relatives, PCR and sequencing were performed.A germline A195V mutation in AIP was identified in the index case and in five asymptomatic relatives. Germline mutations in the AIP gene may be involved in the predisposition to pituitary adenoma formation, as cause or co-factor in pathogenesis of aggressive tumors in young patients.
authors.affiliation: Endocrinology Unit, Universidade de Brasília, DF, Brazil. draluciananaves@gmail.com
authors.forename: Luciana Ansaneli
authors.initials: LA
authors.lastname: Naves
authors.forename: Marie-Lise
authors.initials: ML
authors.lastname: Jaffrain-Rea
authors.forename: Sergio Alberto Cunha
authors.initials: SA
authors.lastname: Vêncio
authors.forename: Clausmir Zaneti
authors.initials: CZ
authors.lastname: Jacomini
authors.forename: Luiz Augusto
authors.initials: LA
authors.lastname: Casulari
authors.forename: Adrian F
authors.initials: AF
authors.lastname: Daly
authors.forename: Albert
authors.initials: A
authors.lastname: Beckers
mesh_terms: D002648:Child; D018095:Germ-Line Mutation / Q000235:genetics*; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000235:genetics*; D008297:Male; D010375:Pedigree; D010911:Pituitary Neoplasms / Q000235:genetics* / Q000473:pathology; D015175:Prolactinoma / Q000235:genetics* / Q000473:pathology
chemical_list: D047908:Intracellular Signaling Peptides and Proteins; C103265:aryl hydrocarbon receptor-interacting protein