Journal
EUROPEAN JOURNAL OF ENDOCRINOLOGY
Volume 164, Issue 4, Pages 457-465Publisher
BIOSCIENTIFICA LTD
DOI: 10.1530/EJE-10-0892
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- Association pour le Developpement des Recherches Biologiques et Medicales au Centre Hospitalier Regional de Marseille (ADEREM)
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Background: Pituitary stalk interruption syndrome (PSIS) is a particular entity in the population of patients with hypopituitarism. Only rare cases have a known genetic cause. Objectives: i) To compare subgroups with or without extra-pituitary malformations (EPM) in a cohort of PSIS patients to identify predictive factors of evolution, ii) to determine the incidence of mutations of the known pituitary transcription factor genes in PSIS. Study design: We analyzed features of 83 PSIS patients from 80 pedigrees and screened HESX1, LHX4, OTX2, and SOX3 genes. Results: PSIS had a male predominance and was rarely familial (5%). Pituitary hypoplasia was observed only in the group with EPM. Multiple hormone deficits were observed significantly more often with versus without EPM (87.5 vs 69.5% respectively). Posterior pituitary location along the stalk was a significant protective factor regarding severity of hormonal phenotype. A novel HESX1 causative mutation was found in a consanguineous family, and two LHX4 mutations were present in familial PSIS. Conclusion: PSIS patients with EPM had a more severe hormonal disorder and pituitary imaging status, suggesting an antenatal origin. HESX1 or LHX4 mutations accounted for < 5% of cases and were found in consanguineous or familial cases.
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