Abstract：
PURPOSE:The purpose of this study was to evaluate the morphologic magnetic resonance imaging (MRI) characteristics of the pineal gland in retinoblastoma (Rb) patients without and with pineoblastoma in comparison to age-matched controls to improve early identification of pineoblastomas (trilateral retinoblastoma, TRb). METHODS AND MATERIALS:80 patients with retinoblastoma and 80 age-matched controls who had undergone brain MRI were included in this retrospective institutional review board approved cohort study. Two readers analyzed the following MR characteristics of the pineal gland: signal intensity on T1- and T2-weighted images, enhancement pattern, delineation of the gland, presence of cystic component, size of pineal gland and size of pineal cysts, respectively. A third reader assessed all images for the presence or absence of pineoblastoma. RESULTS:3 patients were positive (TRb cohort) and 77 negative for pineoblastoma (non-TRb cohort). The mean maximum diameter of the pineal gland was 6.4mm in Rb patients and 6.3mm in age-matched controls. The mean volume of the pineal gland in Rb patients was 93.1mm(3) and was 87.6mm(3) in age-matched controls. Considering all available MRI scans the mean maximum diameter of the pineal gland in TRb patients was 11.2mm and the mean volume in TRb patients was 453.3mm(3). The third reader identified pineoblastomas with a sensitivity of 100% (3 of 3) and a specificity of 94% (72 of 77). CONCLUSION:Our non-TRb patients did not show significant differences in the size of the pineal gland and pineal gland cysts compared to age-matched controls. The presented data can serve as a reference for the volume of normal pineal glands and pineal cysts in the diagnostic work-up of Rb patients with suspected pineoblastoma.
journal_name
J Neurol Scijournal_title
Journal of the neurological sciencesauthors
Pham TT,Siebert E,Asbach P,Willerding G,Erb-Eigner Kdoi
10.1016/j.jns.2015.10.046subject
Has Abstractpub_date
2015-12-15 00:00:00pages
185-92issue
1-2eissn
0022-510Xissn
1878-5883pii
S0022-510X(15)02538-1journal_volume
359pub_type
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