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  • Title: [Dura thickening adjacent to intracranial, para-dural space-occupying lesions in MRI. Histologic correlation].
    Author: Hutzelmann A, Palmié S, Freund M, Buhl R, Heller M.
    Journal: Aktuelle Radiol; 1997 Nov; 7(6):305-8. PubMed ID: 9467021.
    Abstract:
    PURPOSE: With intracranial tumors a flat, contrast-enhancing, probably dural structure adjacent to the tumor can occasionally be observed on gadolinium-DTPA enhanced MR images. Thers we have attempted to evaluate a tumor infiltration of these enhancement on MRI. MATERIAL AND METHODS: This study included 50 patients, 19 patients had a dural thickening at the tumor base (13 meningiomas and 6 metastases), while 31 patient did not (12 meningiomas and 19 metastases). Studies included plane T2-weighted spin echo (SE) images as well as T1-weighted axial, coronal, or sagittal plains with and without contrast agent. Histopathological examinations, were done on the tumor base adjacent to the dura mater. RESULTS: 7 of 12 meningiomas showed a meningeal thickening on MRI with histopathologically proven tumor infiltration as did also 5 of 6 metastases. But 3 of 12 meningiomas and 15 of 19 metastases without dural thickening at the tumor base also showed tumor invasion into the dura mater. CONCLUSION: MR imaging is still not able to determine whether or not there is a dural infiltration of the tumors base because there was no correlation between MR images and histopathologic results. In conclusion, metastases adjacent to the dura infiltrate the dura mater in a higher percentage than meningiomas.
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