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- Kenji Miki, Koji Yoshimoto, Ataru Nishimura, Satoshi O Suzuki, Akio Hiwatashi, and Koji Iihara.
- Department of Neurosurgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
- World Neurosurg. 2017 Sep 1; 105: 1033.e11-1033.e14.
BackgroundEcchordosis physaliphora (EP) is a benign notochordal remnant that is usually asymptomatic. We report a case of a symptomatic large EP mimicking an epidermoid cyst.Case DescriptionA 44-year-old woman presented with right facial dysesthesia. Brain magnetic resonance imaging showed a mass with a diameter of 3.2 cm that was hypointense on T1-weighted imaging, hyperintense on T2-weighted imaging, isointense to hyperintense on diffusion-weighted imaging, and hyperintense on apparent diffusion coefficient map (1.2-1.6 × 10-3 mm2/second). There was no apparent contrast enhancement. Differential diagnoses included epidermoid cyst, dermoid cyst, EP, chordoma, chondrosarcoma, neurenteric cyst, and arachnoid cyst. Clinicopathologic examination revealed that the mass was an EP.ConclusionsEP in the prepontine cistern should be considered in the differential diagnosis of epidermoid cyst.Copyright © 2017 Elsevier Inc. All rights reserved.
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