非产后期乳腺炎的MRI表现分析

目的:分析非产后期乳腺炎的MRI表现,旨在提高对本病的认识.方法:回顾性分析30例病理证实为乳腺炎患者的临床资料及MRI表现.结果:增强后1例呈肿块样强化,29例(96.7％)表现为非肿块样强化.其中区域样强化者17例,段样强化7例,局灶性强化3例,线样及弥漫性强化各1例；65.5％(19/2 9)的病变内部强化表现为...

MRI findings in non-puerperal Mastitis

Objective：To study the MR Imaging features of non-puerperal mastitis,and to improve the diagnosis of the disease.Methods：Clinical and MR imaging findings of non-puerperal mastitis were retrospectively reviewed in 30 women confirmed by pathology.Results：29（96.7%） lesions showed non-mass-like enhancement and one lesion mass-like enhancement.Of 29 lesions with non-mass-like enhancement,the patterns of enhancement were regional in 17 cases,segmental in 7 cases,focal in three patients,linear and diffuse in one case,respectively;65.5%（19/29） lesions appeared clumped-ring enhancement,the percentage of heterogeneous,reticular and stippled enhancement were 24.1%（7/29）,6.9%（2/29） and 3.5%（1/29）,respectively.Of 30 lesions,the percentage of time-signal curve after dynamic enhancement in type I,type II and type III were 40%,50% and 10%,respectively.13 of 14 patients with axillary lymph node enlargement and 5 of 7 patients with nipple retraction and/or skin thickening（two patients only with nipple retraction,three only with skin thicke-ning,and two with nipple retraction and skin thickening） were found to have signs of inflammation clinically.Of all lesions,the BI-RADS category were over 4,and the percentage of BI-RADS 4a,4b,4c and 5 were 53.3%,20%,20% and 17.8%,respectively.If BI-RADS 4b were considered suspicious malignant lesions,the misdiagnosis ratio of MRI was 46.7%（14/30） in our series.Conclusion：Regional and clumped-ring enhancement,and type Ⅰ or Ⅱ in time-signal curve are characteristic MRI findings of non-puerperal mastitis.Inflammatory reaction is common appearances in the patients with axillary lymph node enlargement and/or nipple retraction.The misdiagnosis ratio of mastitis using MRI is high,so clinical data should be referred when making diagnosis.