Head and Neck Imaging

Imaging Diagnosis of 8 Cases with Chordoid Meningioma*

Author:WANG Xue-song, WU Jian-gang, ZHOU Yang,et al.

affiliation: Imaging Center, Panzhihua City Second People's Hospital, Panzhihua 617068, Sichuan Province, China

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Abstract

Objective To summarize the imaging characteristics of 8 cases with chordoid meningioma. Methods Eight patients with chordoid meningioma who were treated in the department of neurosurgery in our hospital between January 2013 and March 2016 were selected as subjects and were retrospectively analyzed. All were confirmed by pathology. Among them, 6 cases underwent CT plain scan, and 8 cases underwent MRI plain scan and enhanced scan. The imaging features of CT, MRI plain scan and enhanced scan were analyzed to provide reference for the clinical diagnosis of chordoid meningioma. Results The findings of 6 patients undergoing CT showed equal density in 4 cases, slightly lower density in 1 case and equal-low mixed density in 1 case. The main manifestations of MRI were slightly low signal in 6 cases and equal signal in 2 cases on T1WI, slightly high signal in 5 cases, equal signal in 2 cases, obvious high signal in 1 case on T2WI. After enhanced scan, there were 7 cases with inhomogeneous enhancement and 1 case with homogeneous enhancement. 3 cases gad varying degrees of edema around the tumor. Enhanced scan showed 4 cases with dural tail sign, 1 case with honeycomb-like peripheral enhancement and involved surrounding brain tissues. Conclusion Chordoid meningioma is a rare type of meningioma. Its image enhancement pattern has certain characteristics, with certain characteristics of malignant tumor. It can invade brain parenchyma, usually without bone destruction, which is good for imaging diagnosis.

【Keyword】Chordoid Meningioma; CT; MRI; Image Features

【Chart number】R739.45;R445.2

【Document Identification Number】A

【DOI】 10.3969/j.issn.1672- 5131.2017.04.010