Abstract
Background
Supratentorial atypical teratoid rhabdoid tumor (ATRT) in many cases has a distinctive appearance on post-gadolinium MRI.
Objective
We sought to determine whether this is a unique appearance allowing ATRT to be distinguished accurately from other types of pediatric supratentorial tumors.
Materials and methods
Retrospective review of all available preoperative MRI of pediatric supratentorial tumors at two tertiary children’s hospitals, and systematic literature review of case series and reports describing the MRI imaging appearances of supratentorial ATRT.
Results
We had 61 supratentorial tumors, including 32 gliomas, 6 ATRT, 8 ependymomas, 6 gangliogliomas, 2 pilomyxoid astrocytomas, 3 primitive neuro-ectodermal tumors, 2 choroid plexus papillomas, and 2 meningiomas. ATRT presented in significantly younger patients than astrocytomas (mean age 2.6 years vs. 9.9 years, P < 0.05). The visual pattern of a thick, wavy (irregular) heterogeneously enhancing wall around a cystic center was seen in 5/6 (83%) ATRTs and only 3/55 (5.4%) other tumors (P < 0.0001), for specificity of 95%, sensitivity of 83%, positive predictive value of 63% and a negative predictive value of 95%.
Conclusion
A supratentorial tumor with a thick, wavy (irregular) heterogeneously enhancing wall surrounding a central cystic region is suggestive of ATRT in the appropriate clinical setting, especially in a child of preschool age.
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Au Yong, K.J., Jaremko, J.L., Jans, L. et al. How specific is the MRI appearance of supratentorial atypical teratoid rhabdoid tumors?. Pediatr Radiol 43, 347–354 (2013). https://doi.org/10.1007/s00247-012-2530-z
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DOI: https://doi.org/10.1007/s00247-012-2530-z