Department of Radiology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu, China.
Br J Radiol. 2013 Nov;86(1031):20130220. doi: 10.1259/bjr.20130220. Epub 2013 Sep 12.
To investigate the morphological features of breast lymphoma (BL) on MRI.
MRI features of 20 patients with BL (12 primary and 8 secondary) were reviewed according to Breast Imaging-Reporting and Data System categories.
19 cases were unilateral and 1 was bilateral. According to the enhanced images, of the 20 cases, BL presented as a mass in 11 (55%), as an enhancement with no mass effect in 7 (35%) and as a mass and mixed enhancement with no mass effect in 2 (10%). There were 38 masses and 44 lesions with no mass effect in our study. All lesions showed mild heterogeneous internal enhancement. For lesions with mass effect, the margins were smooth in 32% (12/38) and irregular in 68% (26/38); and the shape was oval in 87% (32/38). Kinetic curve assessment (13 cases, 38 lesions) revealed that the average initial rise rate was 104%. The type II enhancement curve appeared in 55% (21/38) of lesions. No significant differences between the primary and secondary BL were observed for any of the MRI features.
BL mostly appeared oval with irregular margins showing mild heterogeneous internal enhancement and/or as enhanced lesions with no mass effect with mild heterogeneous internal enhancement.
Some special features on MRI are useful for the diagnosis of BL.
探讨乳腺淋巴瘤（BL）的 MRI 形态学特征。
回顾 20 例 BL 患者（12 例原发性，8 例继发性）的 MRI 特征，按乳腺影像报告和数据系统分类进行评估。
19 例为单侧，1 例为双侧。根据增强图像，20 例中 BL 表现为肿块 11 例（55%），无肿块效应的强化 7 例（35%），肿块和无肿块效应的混合强化 2 例（10%）。本研究共发现 38 个肿块和 44 个无肿块效应的病变。所有病变均表现为轻度不均匀内部强化。对于有肿块效应的病变，边缘光滑者占 32%（12/38），不规则者占 68%（26/38）；形状为椭圆形者占 87%（32/38）。动力学曲线评估（13 例，38 个病变）显示平均初始上升率为 104%。55%（21/38）的病变呈 II 型强化曲线。原发性和继发性 BL 在任何 MRI 特征上均无显著差异。
BL 多表现为形态不规则的椭圆形，内部轻度不均匀强化，或表现为轻度不均匀强化的无肿块效应强化病变。
MRI 上的一些特殊表现有助于 BL 的诊断。
