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目的分析乳腺叶状肿瘤(PTs)MRI平扫及动态增强扫描的表现特征,以提高该病的MRI诊断水平。方法回顾性分析7例行MRI检查并经手术病理证实的PTs的MRI表现,包括肿瘤大小、形态学、平扫T1WI及T2WI信号的特点、动态增强表现及强化曲线类型,并与病理结果相对照。结果 7例乳腺PTs病理诊断良性4例,交界性2例,恶性1例。MRI上5例病灶>3 cm,外形为分叶状,2例<3 cm,外形为卵圆形;3例T1WI呈低信号,4例T1WI呈低高信号,5例T2WI呈不均匀高低混杂信号,2例T2WI呈高信号;4例肿瘤内见不强化的囊变区;5例有T2WI、T1WI低信号且不强化的分隔;所有PTs增强早期呈快速强化(1～2个时相),5例中后期TIC为平台型,2例中后期TIC呈渐增性强化。结论 MRI检查有助于乳腺PTs的诊断,但确诊仍需依靠病理组织学检查。
Objective To analyze the features of MRI plain scan and dynamic contrast-enhanced scan of breast phyllodes tumor (PTs) to improve the MRI diagnosis of this disease. Methods The MRI features of 7 cases with PTs confirmed by surgery and pathology were retrospectively analyzed, including tumor size, morphology, characteristics of T1WI and T2WI signals, dynamic enhancement and the type of enhancement curve, and were compared with pathological results . Results The pathologic diagnosis of PTs in 4 cases of breast showed 4 cases of benign, 2 cases of borderline and 1 case of malignant. Five lesions were> 3 cm in MRI, lobulated in 2 cases <3 cm and oval in outline. Three cases showed low signal on T1WI, low signal on 4 cases and low level on T1WI in 5 cases 2 cases showed high signal on T2WI; 4 cases showed no cystic area in tumor; 5 cases had T2WI, T1WI low signal and no enhancement separation; all PTs enhanced rapidly at early stage (1 ~ 2 phases) , 5 cases of mid-and late-stage TIC platform type, 2 cases of mid-and late TIC was gradually enhanced. Conclusion MRI examination is helpful for the diagnosis of PTs in breast, but the diagnosis still depends on histopathological examination.