Delayed Postcontrast CT and MR Imaging of Chondroid Chordoma — Case Report

Abstract

A rare case of intracranial primary chondroid chordoma is reported with special reference to neuroradiological findings. A precontrast computed tomographic (CT) scan revealed an isodense mass with multiple flecks in the right cerebellopontine region. A postcontrast CT scan showed slight ring enhancement. A delayed postcontrast CT scan demonstrated marked homogeneous enhancement extending from the middle cranial fossa to the cerebellopontine region on the right. Magnetic resonance(MR) imaging demonstrated a well-defined lesion as a high-intensity mass on T2 weighted image and a low-intensity mass on T1 weighted image 5 minutes after gadolinium-diethylenetri aminepenta-acetic acid administration showed heterogeneous enhancement. A MR image 30 minutes after the contrast administration showed more marked, homogeneous enhancement. Such delayed postcontrast CT and MR imaging are useful in the differentiation of chondroid chordoma from classical chordoma. © 1992, The Japan Neurosurgical Society. All rights reserved.