%0 Journal Article
%A Alhambra-Exposito, Maria R
%A Ibañez-Costa, Alejandro
%A Moreno-Moreno, Paloma
%A Rivero-Cortes, Esther
%A Vazquez-Borrego, Mari C
%A Blanco-Acevedo, Cristobal
%A Toledano-Delgado, Alvaro
%A Lombardo-Galera, Maria S
%A Vallejo-Casas, Juan A
%A Gahete, Manuel D
%A Castaño, Justo P
%A Galvez, Maria A
%A Luque, Raul M
%T Association between radiological parameters and clinical and molecular characteristics in human somatotropinomas.
%D 2018
%U http://hdl.handle.net/10668/12367
%X Acromegaly is a rare but severe disease, originated in 95% of cases by a growth hormone-secreting adenoma (somatotropinoma) in the pituitary. Magnetic resonance imaging (MRI) is a non-invasive technique used for the diagnosis and prognosis of pituitary tumours. The aim of this study was to determine whether the use of T2-weighted signal intensity at MRI could help to improve the characterisation of somatotropinomas, by analysing its relationship with clinical/molecular features. An observational study was implemented in a cohort of 22 patients (mean age = 42.1 ± 17.2 years; 59% women; 95% size>10 mm). Suprasellar-extended somatotropinomas presented larger diameters vs. non-extended tumours. T2-imaging revealed that 59% of tumours were hyperintense and 41% isointense adenomas, wherein hyperintense were more invasive (according to Knosp-score) than isointense adenomas. A higher proportion of hyperintense somatotropinomas presented extrasellar-growth, suprasellar-growth and invasion of the cavernous sinus compared to isointense adenomas. Interestingly, somatostatin receptor-3 and dopamine receptor-5 (DRD5) expression levels were associated with extrasellar and/or suprasellar extension. Additionally, DRD5 was also higher in hyperintense adenomas and its expression was directly correlated with Knosp-score and with tumour diameter. Hence, T2-weighted MRI on somatotropinomas represents a potential tool to refine their diagnosis and prognosis, and could support the election of preoperative treatment, when required.
%K Acromegaly
%K Biomarkers
%K Disease management
%K Disease susceptibility
%K Growth hormone-secreting pituitary adenoma
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