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Abstract：
UNASSIGNED: To review breast magnetic resonance imaging (MRI) features of radial scar (RS) with and without associated atypia/malignancy.
UNASSIGNED: Twenty-eight (mean age 56.8) patients diagnosed with 30 biopsy-proven RS (n = 25, ultrasound-guided 14-gauge, n = 5, stereotactically guided 9-gauge) subsequently underwent breast MRI followed by surgery. Magnetic resonance imaging protocol included axial T1, axial fat sat T2, and postgadolinium in axial and sagittal planes. Two radiologists reviewed the mammographic and MRI findings in consensus according to the Breast Imaging Reporting and Data System lexicon.
UNASSIGNED: Of the 30 RSs excised surgically, 14 (14/30, 47.7%) were not associated with atypia/malignancy while atypia/malignancy was found in 16 (16/30, 53.3%) RSs. Three (3/30, 10%) RS lesions did not enhance on dynamic MR. Mean lesion size on MRI was 1.4 cm (range, 0.5-5 cm). Seventeen (17/30, 56.7%) lesions presented as nonmass enhancement and 9 (9/30, 30%) as masses. Nonmass lesions showed focal distribution (13/17, 76.5%) and heterogeneous enhancement (15/17, 88.2%). Masses showed irregular shape and margins (6/9, 67%) and heterogeneous enhancement (8/9, 89%). Multivariate analysis did not show any significant difference in MRI presentation between RS only and RS associated with atypia/malignancy.
UNASSIGNED: Breast MRI does not help differentiate between RS with or without associated atypia/malignancy.
UNASSIGNED: Twenty-eight (mean age 56.8) patients diagnosed with 30 biopsy-proven RS (n = 25, ultrasound-guided 14-gauge, n = 5, stereotactically guided 9-gauge) subsequently underwent breast MRI followed by surgery. Magnetic resonance imaging protocol included axial T1, axial fat sat T2, and postgadolinium in axial and sagittal planes. Two radiologists reviewed the mammographic and MRI findings in consensus according to the Breast Imaging Reporting and Data System lexicon.
UNASSIGNED: Of the 30 RSs excised surgically, 14 (14/30, 47.7%) were not associated with atypia/malignancy while atypia/malignancy was found in 16 (16/30, 53.3%) RSs. Three (3/30, 10%) RS lesions did not enhance on dynamic MR. Mean lesion size on MRI was 1.4 cm (range, 0.5-5 cm). Seventeen (17/30, 56.7%) lesions presented as nonmass enhancement and 9 (9/30, 30%) as masses. Nonmass lesions showed focal distribution (13/17, 76.5%) and heterogeneous enhancement (15/17, 88.2%). Masses showed irregular shape and margins (6/9, 67%) and heterogeneous enhancement (8/9, 89%). Multivariate analysis did not show any significant difference in MRI presentation between RS only and RS associated with atypia/malignancy.
UNASSIGNED: Breast MRI does not help differentiate between RS with or without associated atypia/malignancy.
摘要：
■回顾伴有或不伴有非典型性/恶性的放射状瘢痕（RS）的乳腺磁共振成像（MRI）特征。
■28例（平均年龄56.8）患者被诊断为30例活检证实的RS（n=25，超声引导的14规格，n=5，立体定向引导的9规格）随后进行了乳腺MRI，然后进行了手术。磁共振成像方案包括轴向T1，轴向脂肪satT2和轴向和矢状平面中的后钆。两名放射科医生根据乳腺影像报告和数据系统词典，一致审查了乳房X线摄影和MRI的发现。
■在手术切除的30个RSs中，14例（14/30，47.7％）与异型/恶性无关，而在16例（16/30，53.3％）RSs中发现异型/恶性。三个（3/30，10％）RS病变在动态MR上没有增强。MRI平均病灶大小为1.4cm（范围，0.5-5厘米）。17例（17/30，56.7％）病变表现为非肿块增强，9例（9/30，30％）为肿块。非肿块性病变呈局灶性分布（13/17，76.5％）和异质性增强（15/17，88.2％）。肿块呈不规则形状和边缘（6/9，67％）和异质增强（8/9，89％）。多因素分析显示，仅RS和与不典型/恶性相关的RS之间的MRI表现没有任何显着差异。
■乳腺MRI无助于区分RS伴或不伴异型性/恶性。
■28例（平均年龄56.8）患者被诊断为30例活检证实的RS（n=25，超声引导的14规格，n=5，立体定向引导的9规格）随后进行了乳腺MRI，然后进行了手术。磁共振成像方案包括轴向T1，轴向脂肪satT2和轴向和矢状平面中的后钆。两名放射科医生根据乳腺影像报告和数据系统词典，一致审查了乳房X线摄影和MRI的发现。
■在手术切除的30个RSs中，14例（14/30，47.7％）与异型/恶性无关，而在16例（16/30，53.3％）RSs中发现异型/恶性。三个（3/30，10％）RS病变在动态MR上没有增强。MRI平均病灶大小为1.4cm（范围，0.5-5厘米）。17例（17/30，56.7％）病变表现为非肿块增强，9例（9/30，30％）为肿块。非肿块性病变呈局灶性分布（13/17，76.5％）和异质性增强（15/17，88.2％）。肿块呈不规则形状和边缘（6/9，67％）和异质增强（8/9，89％）。多因素分析显示，仅RS和与不典型/恶性相关的RS之间的MRI表现没有任何显着差异。
■乳腺MRI无助于区分RS伴或不伴异型性/恶性。
