Prevalence of double pituitary adenomas in a surgical series: Clinical, histological and genetic features

F. Magri, C. Villa, D. Locatelli, P. Scagnelli, M. S. Lagonigro, P. Morbini, M. Castellano, E. Gabellieri, M. Rotondi, E. Solcia, A. F. Daly, L. Chiovato

Research output: Contribution to journalArticle

Abstract

Background: The term double pituitary adenomas (DPA) is usually referred to those rare lesions showing two distinct cellular components. Genetic background may sustain the proliferation of more than one cell at the same time but no information is available on the presence of aip mutations in these patients. Aim: We report the prevalence and the endocrinological, neuroradiological, histopathological and genetic features of DPA detected in a large surgical series. The contribution of pituitary transcription factor immunostains in DPA was also evaluated. Subjects and methods: One-hundred-forty-four patients undergoing surgery for tumors of the sellar region were evaluated. Histopathology, immunohistochemistry and the mutational analysis for the entire coding region of the AIP and MEN1 genes were performed. Results: One-hundred-seventeen patients out of 144 had a pituitary adenoma. DPA was found in 3 (2.6%) out of 117 patients with pituitary adenoma. Immunohistochemistry and transcription factors analysis demonstrated two not yet described histotype associations in DPA. The coexistence of somatotroph-lactotroph and silent mammosomatotroph histotype in 1 case and the coexistence of sparsely granulated lactotroph and null cell adenomas in the remaining two cases were first identified. Sequencing data for the coding region of the aip and the menin gene resulted in wild type sequences in all patients with DPA. Conclusions: The prevalence of DPA observed in our unselected surgical series is not negligible (2.6%). Furthermore, the evaluation of the treatment outcome would suggest that the clinical management of DPAs requires a careful diagnostic approach and follow-up.

Original languageEnglish
Pages (from-to)325-331
Number of pages7
JournalJournal of Endocrinological Investigation
Volume33
Issue number5
DOIs
Publication statusPublished - May 2010

Keywords

  • AIP gene
  • Double pituitary adenoma
  • Menin gene
  • Pituitary transcription factor

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

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