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Abstract #4490

Multi-phase contrast-enhanced magnetic resonance imaging with respiratory gating in papillary thyroid carcinoma

Hao Wang1 and Bin Song2

1Radiology, Central Hospital of Minhang District, Fudan University, Shanghai, People's Republic of China, 2Radiology, Central Hospital of Minhang District, Fudan University, People's Republic of China

Purpose To investigate the role of multi-phase contrast-enhanced MR imaging in papillary thyroid carcinoma (PTC). Methods A consecutive series of 62 lesions with PTC were prospective evaluated by MR imaging. Lesions were evaluated for location, size, shape, margin, rim, degree and pattern of enhancement. Results 52 (83.9%) lesions showed moderate enhancement. 45 (72.6%) lesions showed ring-enhancement and 42 (67.7%) showed central washout enhancement during the delayed phase. 36(58.1%) manifested ill-defined margin and irregular rim (49, 79.0%) after administration of the contrast medium. Nine nodules (14.5%) showed extrathyroidal extension. Conclusion PTC commonly manifest moderate enhancement during the initial phase, with ill-defined margin and irregular rim. Central wash out enhancement and ring-enhancement occur during delayed contrast –enhanced phase.

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