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American Journal of Roentgenology, Vol 145, Issue 1, 143-147
Copyright © 1985 by American Roentgen Ray Society

Articles

Sacrococcygeal chordoma: magnetic resonance imaging and computed tomography

DI Rosenthal, JA Scott, HJ Mankin, GL Wismer, and TJ Brady

Magnetic resonance imaging (MRI) was compared to computed tomography (CT) in four cases of sacrococcygeal chordoma. Both techniques yielded important anatomic information and represented important advances over early radiologic imaging methods. MRI provides superior contrast with surrounding soft tissues because of the prolonged T1 and T2 times of the tumors. This was especially important in a case of recurrent chordoma. The direct sagittal images obtained by MRI were valuable in determining the extent of lesions. Either MRI or direct CT coronal images were needed for the demonstration of tumor involving the sacral nerve roots. It was not possible to reliably distinguish between tumor adherent to bowel wall and bowel wall invasion by either technique. It is concluded that MRI is at least equal to CT for demonstration of these lesions and seems likely to become the imaging method of choice.
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