Unusual CT and MR appearance of an epidermoid tumor of the cerebellopontine angle.
نویسندگان
چکیده
We present a case of an unusual epidermoid tumor of the cerebellopontine angle that appeared hyperdense on CT scans and hyperintense on T1- and T2-weighted MR images. We believe that these imaging characteristics were caused by a high protein concentration within the contents of the cyst.
منابع مشابه
Unusual CT and MRI? Appearance** of an Epidermoid Cyst: A Case Report
We report a case of an unusual epidermoid cyst in cerebellopontine angle that appeared hyperdense on computed tomography (CT) scanning, hyperintense on T1-weighted MR images and hypointense on T2/ FLAIRweighted magnetic resonance (MR) images. Diffusion-weighted imaging in post resection follow up study showed a focal restraction lesion, low on Apperent diffusion cooficent images.
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Epidermoid tumors are rare congenital lesions of ectodermal origin (0 .2-1 % of intracranial neoplasms). They usually are found in the cerebellopontine angle , sellar and suprasellar region , and middle cranial fossa. Histologically , they often have a thin wall lined by stratified squamous epithelium, surrounding a mixture of desquamated debris , cholesterol , keratin, and water [1]. We report...
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This case demonstrated the classic gross pathologic, CT, and MR appearances of epidermoid tumors. The imaging features and differential diagnosis are summarized.
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nial tumors and are histologically benign (1). A case of the transformation of an epidermoid cyst into a malignant squamous cell carcinoma has seldom been reported (2-7). The malignant transformation may have occurred from pre-existing epidermoid cysts or after the incomplete excision of an epidermoid cyst (5). The treatment of the malignant transformation of an epidermoid cyst varies from surg...
متن کاملEpidermoid tumor of the cerebellopontine angle: signal loss in the contralateral cistern.
We report a case of an epidermoid tumor of the right cerebellopontine angle (CPA) in which the contralateral CPA cistern showed abnormal, low signal intensity on T2-weighted fast spin-echo MR images. Diffusion-weighted images showed the epidermoid tumor of the right CPA extending to the prepontine cistern. The cause of the abnormal signal intensity was proved to be an artifactual signal loss du...
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عنوان ژورنال:
- AJNR. American journal of neuroradiology
دوره 19 6 شماره
صفحات -
تاریخ انتشار 1998