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Article

Magnetic resonance imaging findings of extraventricular anaplastic ependymoma: A report of 11 cases

  • Authors:
    • Xi Leng
    • Xin Tan
    • Chi Zhang
    • Huan Lin
    • Shijun Qiu
  • View Affiliations / Copyright

    Affiliations: Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
  • Pages: 2048-2054
    |
    Published online on: July 8, 2016
       https://doi.org/10.3892/ol.2016.4825
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Abstract

Anaplastic ependymomas are rare malignant tumors of the central nervous system. Few studies are available regarding their neuroradiological characteristics. The present study aimed to retrospectively review a series of patients with extraventricular anaplastic ependymoma and to analyze the magnetic resonance imaging (MRI) characteristics to distinguish anaplastic ependymoma from other intracranial tumors. The clinical and pathological images of 11 patients who presented with histologically proven anaplastic ependymoma at Nanfang Hospital (Southern Medical University, Guangzhou, Guangdong, China) between September 2004 and March 2015 were retrospectively reviewed. MRI scans were obtained in all 11 cases. Computed tomography scans were obtained in only 3 cases. In total, 8 tumors were located at the supratentorial parenchyma, and 3 tumors were derived from the cerebellar hemisphere. Images displayed quasi‑circular (4/11), irregularly‑lobulated (7/11) variable‑intensity masses. The masses presented with cysts or necrosis (8/11), hemorrhage (7/11), marked (9/11) or mild (2/11) enhancement, and moderate (4/11), mild (3/11) or absent (4/11) peritumoral edema. The tumors were also frequently closely associated with the lateral ventricle (6/11). Tumors appeared isointense to hypointense on T1‑weighted imaging (T1WI) and heterogeneously hyperintense or hypointense on T2WI, demonstrating wreath‑like and ring‑like characteristics, with intratumoral nodules (3/11) or marked flake‑like inhomogeneous (6/11) enhancement on post‑contrast MRI. Only 2 solid lesions showed mild enhancement (2/11). Although the MRI features of the extraventricular anaplastic ependymomas varied and were non‑specific, these characteristic MRI findings, combined with the locations of the lesions, the age of onset and the short disease course, could be useful in differentiating anaplastic ependymomas from other intracranial neoplasms in the future.
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Copy and paste a formatted citation
Spandidos Publications style
Leng X, Tan X, Zhang C, Lin H and Qiu S: Magnetic resonance imaging findings of extraventricular anaplastic ependymoma: A report of 11 cases. Oncol Lett 12: 2048-2054, 2016.
APA
Leng, X., Tan, X., Zhang, C., Lin, H., & Qiu, S. (2016). Magnetic resonance imaging findings of extraventricular anaplastic ependymoma: A report of 11 cases. Oncology Letters, 12, 2048-2054. https://doi.org/10.3892/ol.2016.4825
MLA
Leng, X., Tan, X., Zhang, C., Lin, H., Qiu, S."Magnetic resonance imaging findings of extraventricular anaplastic ependymoma: A report of 11 cases". Oncology Letters 12.3 (2016): 2048-2054.
Chicago
Leng, X., Tan, X., Zhang, C., Lin, H., Qiu, S."Magnetic resonance imaging findings of extraventricular anaplastic ependymoma: A report of 11 cases". Oncology Letters 12, no. 3 (2016): 2048-2054. https://doi.org/10.3892/ol.2016.4825
Copy and paste a formatted citation
x
Spandidos Publications style
Leng X, Tan X, Zhang C, Lin H and Qiu S: Magnetic resonance imaging findings of extraventricular anaplastic ependymoma: A report of 11 cases. Oncol Lett 12: 2048-2054, 2016.
APA
Leng, X., Tan, X., Zhang, C., Lin, H., & Qiu, S. (2016). Magnetic resonance imaging findings of extraventricular anaplastic ependymoma: A report of 11 cases. Oncology Letters, 12, 2048-2054. https://doi.org/10.3892/ol.2016.4825
MLA
Leng, X., Tan, X., Zhang, C., Lin, H., Qiu, S."Magnetic resonance imaging findings of extraventricular anaplastic ependymoma: A report of 11 cases". Oncology Letters 12.3 (2016): 2048-2054.
Chicago
Leng, X., Tan, X., Zhang, C., Lin, H., Qiu, S."Magnetic resonance imaging findings of extraventricular anaplastic ependymoma: A report of 11 cases". Oncology Letters 12, no. 3 (2016): 2048-2054. https://doi.org/10.3892/ol.2016.4825
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