Evaluation of MR imaging findings differentiating parotid basal cell adenomas from other parotid tumors
Evaluation of MR imaging findings differentiating parotid basal cell adenomas from other parotid tumors
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DOI：
10.1016/j.ejrad.2021.109980
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发表时间：
2021-09-30
影响因子：
3.3
通讯作者：
Ishigami, Kousei
中科院分区：
文献类型：
--
作者：
Murayama, Yuriko;Kamitani, Takeshi;Ishigami, Kousei
目的：探讨磁共振成像（MRI）对腮腺基底细胞腺瘤（bca）与其他腮腺肿瘤鉴别的价值。方法：回顾性纳入2011年12月至2019年3月期间接受宫颈MRI检查的136例组织学证实的腮腺肿瘤（13例bca， 66例多形性腺瘤[PAs]， 30例Warthin肿瘤[WTs]和27例腮腺癌[PCs]）。肿瘤的核磁共振检查结果由两名委员会认证的放射科医生评估。结果：13例bca边缘光滑，27例pc中19例边缘不规则（p < 0.0001）。11例bca有囊性成分，5例为囊性显性。bca的囊性成分明显多于PAs （p = 0.0077）。bca的平均表观扩散系数（ADC）值为1.21 +/- 0.20 × 10(-)3 mm(2)/sec，与PCs的平均值(1.12 +/- 0.25 × 10（-3) mm(2)/sec, p = 0.76）相当，显著低于PAs的平均值(1.61 +/- 0.32 × 10(-3) mm(2)/sec, p < 0.0001)，显著高于WTs的平均值(0.81 +/- 0.19 × 10（-3) mm(2)/sec, p = 0.0004）。平台时间-强度曲线（TIC）是bca和pc最常见的类型，12例bca中有8例出现，26例pc中有21例出现，两组间无显著差异（p = 0.34）。结论：当腮腺病变边缘光滑且包膜完整且包含囊性成分时，即使TIC和弥散加权MR图像显示为恶性模式，也应考虑BCA的可能性。
Purpose: To evaluate the usefulness of magnetic resonance imaging (MRI) to differentiate basal cell adenomas (BCAs) from other parotid tumors.Method: A total of 136 patients with histologically proven parotid gland tumors (13 BCAs, 66 pleomorphic adenomas [PAs], 30 Warthin tumors [WTs], and 27 parotid cancers [PCs]) who underwent a cervical MRI study between December 2011 and March 2019 were retrospectively enrolled. The MRI findings of the tumors were evaluated by two board-certified radiologists.Results: All 13 of the BCAs showed smooth margins, while 19 of the 27 PCs showed irregular margins (p < 0.0001). Eleven BCAs had some cystic components, and five were cyst-dominant. The BCAs had significantly more cystic components than the PAs (p = 0.0077). The mean apparent diffusion coefficient (ADC) value of the BCAs was 1.21 +/- 0.20 x 10(-)3 mm(2)/sec, which was equivalent to that of the PCs (1.12 +/- 0.25 x 10(-3) mm(2)/sec, p = 0.76), significantly lower than that of the PAs (1.61 +/- 0.32 x 10(-3) mm(2)/sec, p < 0.0001), and significantly higher than that of the WTs (0.81 +/- 0.19 x 10(-3) mm(2)/sec, p = 0.0004). The plateau time-intensity curve (TIC) was the most common type for both BCAs and PCs, seen in 8 of 12 BCAs and 21 of 26 PCs, with no significant difference between these groups (p = 0.34).Conclusions: BCA should be considered a possibility when a parotid lesion has smooth margins with an entire capsule and includes a cystic component, even if the TIC and diffusion-weighted MR images suggest a malignant pattern.