Publication date: Available online 2 March 2018
Source:Journal of Neuroradiology
Author(s): Laura Milanese, Chiara Martini, Carla Scaroni, Francesca Dassie, Filippo Ceccato, Alessandro Della Puppa, Luca Denaro, Giulia Bommarito, Valentina Citton, Mario Ermani, Pietro Maffei, Renzo Manara
BackgroundRadiation therapy (RT) effectiveness on hormonal reduction is proven in acromegaly; however, collateral long-term effects are still undetermined. This transversal neuroimaging study on a large cohort of acromegalic patients aimed to investigate the rate of parenchymal and vascular changes after RT.Materials and MethodsThirty-six acromegalic patients underwent RT (RT+) after unsuccessful surgery and were compared to RT- acromegalic patients matched for age, gender, adenoma features, clinical and surgical history. All patients underwent magnetic resonance angiography (MRA) to investigate intracranial artery abnormalities and FLAIR sequence to assess white matter changes according to the Wahlund scale.ResultsRT+ acromegalic patients had a higher rate of controlled disease (29/36 vs 12/36, p<0.001). RT+ acromegalic patients had MRI/MRA evaluation 15.3±9.6 years after RT. RT+ acromegalic patients had a significantly higher Wahlund score than RT- acromegalic patients (6.03±6.41 vs 2.53±3.66, p=0.006) due to increased white matter signal abnormalities at the level of the temporal lobes, the basal ganglia (insula) and the infra-tentorial regions, bilaterally. Among RT+ patients one died because of temporo-polar anaplastic astrocytoma, one suffered from a stroke due to right internal carotid artery occlusion, one presented with cystic degeneration of the temporal poles. Long-dated RT (>10 years before MR evaluation) was associated with a higher rate of RT-related white matter changes (p=0.0004).ConclusionsRT seems to have created a cohort of patients with brain parenchymal changes whose clinical and cognitive impact is still unknown. These patients might require a prolonged MRI and MRA follow-up to promptly detect delayed RT-related complications and minimize their clinical consequences.
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Παρασκευή 2 Μαρτίου 2018
Radiotherapy in acromegaly: long-term brain parenchymal and vascular magnetic resonance changes
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