Multiparametric MRI findings of sinonasal rhabdomyosarcoma in adults with comparison to carcinoma.
JOURNAL OF MAGNETIC RESONANCE IMAGING(2017)
摘要
PurposeTo identify magnetic resonance imaging (MRI) features of sinonasal rhabdomyosarcoma in adults, including diffusion-weighted (DW) and dynamic contrast-enhanced (DCE) MRI features as compared with carcinomas. Materials and MethodsSixty-four patients were included in this study, including 12 sinonasal rhabdomyosarcomas and 52 sinonasal carcinomas. MRI was completed in all 64 patients with a 3T MR scanner. Conventional MR (nonenhanced and static contrast-enhanced) imaging features, DCE-MRI parameters, and the apparent diffusion coefficients (ADCs) were analyzed by two authors independently (X.Y.W. and Y.Z.W.). ResultsCompared with gray matter, sinonasal rhabdomyosarcomas appeared isointense on T-1-weighted images in 11 cases (91.7%, 11 of 12), and hyperintense on T-2-weighted images in 9 patients (75%, 9 of 12). After contrast, sinonasal rhabdomyosarcomas showed inhomogeneous enhancement in 10 cases (83.3%, 10 of 12). Skull involvement was found in eight patients (66.7%) with rhabdomyosarcomas. On T-2-weighted images, sinonasal carcinomas demonstrated isointense in 31 cases (59.6%, 31/52), hyperintense in 14 (26.9%, 14/52), and hypointense in 7 (13.5%, 7/52). Skull involvement was detected in 14 cases (14/52, 26.9%). There were significant differences in T-2 signal intensity (P=0.005) and skull involvement (P=0.016) between sinonasal rhabdomyosarcoma and carcinomas. There was a marginal difference in time to peak enhancement (P=0.061), while no difference in time to maximum enhancement (P=0.403), maximum contrast index (P=0.368), and time-intensity curve types (P=0.138) between rhabdomyosarcoma and carcinomas. The ADCs of sinonasal rhabdomyosarcoma were significantly lower than those of sinonasal carcinomas (P < 0.001). ConclusionA multiparametric approach using conventional MRI with added ADCs had the potential to improve the diagnostic accuracy of sinonasal rhabdomyosarcoma in adults.
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关键词
sinonasal carcinoma,magnetic resonance imaging,dynamic contrast-enhanced,diffusion-weighted,adult rhabdomyosarcoma
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