A case of ecchordosis physaliphora in the prepontine cistern: a rare entity in the differential diagnosis of an epidermoid cyst.

A case of ecchordosis physaliphora in the prepontine cistern: a rare entity in the differential diagnosis of an epidermoid cyst.

World Neurosurg. 2017 Jun 09;:

Authors: Miki K, Yoshimoto K, Nishimura A, Suzuki SO, Hiwatashi A, Iihara K

Abstract
BACKGROUND: Ecchordosis physaliphora (EP) is a benign notochordal remnant, which is usually asymptomatic. Herein, we report a case of symptomatic large EP mimicking an epidermoid cyst.
CASE DESCRIPTION: A 44-year-old female presented with right facial dysesthesia. Brain magnetic resonance imaging (MRI) showed a mass with a diameter of 3.2 cm that was hypointense on T1-weighted images (T1WI), hyperintense on T2-weighted images (T2WI), iso-to-hyperintense on diffusion-weighted (DW) images, and hyperintense on apparent diffusion coefficient (ADC) map (1.2-1.6× 10(-3) mm(2)/s). There was no apparent contrast enhancement. Differential diagnoses include epidermoid cyst, dermoid cyst, EP, chordoma, chondrosarcoma, neurenteric cyst, and arachnoid cyst. A clinicopathological examination revealed that the mass was an EP.
CONCLUSION: EP in the prepontine cistern could be considered in the differential diagnosis of an epidermoid cyst.

PMID: 28606578 [PubMed - as supplied by publisher]

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