Retinoblastoma—MR appearance using a surface coil in comparison with histopathological results
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The purpose of this work was to evaluate the characteristic appearance of untreated retinoblastoma on a large sample in comparison to the histological findings after therapeutical enucleation.
Materials and methods
In a prospective clinical trial 46 children with retinoblastoma in 63 affected untreated eyes were examined under general anesthesia on MRI using a 1.5-T system. The examinations were performed with a special surface coil applying an examination protocol including fast T2- and T1-weighted spin echo sequences and additional fast T1-WI after intravenous injection of Gd-DTPA in different planes. The imaging results were compared to the histopathological findings in 29 patients with 30 affected eyes.
Comparing MRI findings and histopathological results, optic nerve infiltration was detected with a sensitivity of 53.8% and a specificity of 82.3% on MRI, infiltration of the choroid with a sensitivity of 75.0% and a specificity of 100.0%, and the degree of tumor calcification with a sensitivity of 91.7% and a specificity of 88.9%. In this study the characteristic MR appearance of untreated retinoblastoma was evaluated.
MRI was helpful in relevant aspects of pretherapeutical retinoblastoma staging, deficits remain regarding optic nerve infiltration.
KeywordsMRI Retinoblastoma Surface coil Eye tumors Eye Orbit
This work was supported by a grant from the Deutsche Forschungsgemeinschaft Graduiertenkolleg 331 “Temperaturabhängige Effekte in Therapie und Diagnostik”.
This work was supported by grant “Intraokulare Geschwülste im Kindes- und Erwachsenenalter: 3D-Bestrahlungsplanung mit der hochauflösenden Magnetresonanztomographie” from Deutsche Krebshilfe.
This work was supported by grant “Magnetresonanztomographische Tumordiagnostik unter Einsatz eines schnellen Gradientensystems” from Deutsche Krebshilfe.
This work is part of the thesis of Ulrike Mergner.