THE VALUE OF COMPARATIVE IMAGING DIAGNOSIS OF ENCHONDROMA IN THE UNTYPICAL IOCATION

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1 * X CT MRI 18 X CT MRI 11 7 X CT MRI T 2 T 1 T 2 R738.3 A DOI: /j.cnki.issn x X THE VALUE OF COMPARATIVE IMAGING DIAGNOSIS OF ENCHONDROMA IN THE UNTYPICAL IOCATION WANG Zhi-yong LI Wei YU Jing-hong The Second Affiliated Hospital Inner Mongolia Medical University Hohhot China Abstract Objective To discuss the clinical and imaging manifestations of the untypical endogenous and master the imaging features.methods Analyzing 18 cases of enchondroma which were confirmed by surgery and pathology. Results X -ray and CT showed lesion or irregular cystic lesions of bone destruction with sand or popcorn like calcification without cortical bone destruction some showed typical signs of Scallop in Shell syndrome.mri showed lobulated or rosette like hybrid T2 hybrid T1 signal change in short T2 signal and after enhanced scanning showed inhomogeneous mild enhancement lesion with clear boundary. Conclusion The untypical enchondroma has the typical clinical and imaging features combined with the comprehensive analysis of various examination methods is helpful for its accurate qualitative diagnosis. Key words enchondroma the untypical location comparative imaging signs diagnosis 18 X CT MRI yujinghong200@ 126.com

2 X % ~ ~ % X SIEMENS opti X DR CT % X 120kV 250mA X 0.8mm m 2 50% CT GE BrightSpeed CT 0.625mm 2.5mm MRI % 5 GE 1.5T 62.5% T1WI TR /TE 500 ms /18ms mm 1.5mm 24 FOV 370 mm NEX2 6.5 mm 1.5 mm 24 FOV 370 mm NEX2 X 6 CT 3 MRI 5 X CT 1 X MRI μm HE % % T2 T1 T2 T2WI TR /TE 1650 ms /100ms X 3 17% 1 5% 6 33% %

3 CT Fig.1 1 X CT X-ray and CT films of atypical cartilaginous tumors MRI T2 T1 75% ~ 80% 1 4 T2 6 MRI X CT T1WI T1 2 /3 4cm T1 T1 5 MRI T cm

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