Imaging of the intraparotid course of the facial nerve remains a challenge and is not an established routine procedure. The aim of this study was to evaluate ultrasound in localizing a parotid tumor in relation to the facial nerve. The ultrasound findings and operative reports of all patients treated for parotid gland tumors were studied retrospectively. Eight hundred sixty-eight parotid lesions formed our study sample. The unit of measurement was the minimal distance between the parotideomasseteric fascia and the superficial capsule of the tumor, measured in millimeters by means of ultrasound. The mean value for this parameter was 1.3 mm for superficial and 4.6 mm for deep lobe tumors (p < 0.001). When the cutoff value was set at 2.6 mm, the sensitivity and specificity of ultrasound were 89.6 and 88.4%, respectively. Our study revealed that ultrasound can help in the pre-operative differentiation between tumors of the superficial and deep lobes of the parotid gland.

面神经腮内路线的成像仍然是一个挑战，并不是一个既定的常规程序。本研究的目的是评估超声定位与面神经相关的腮腺肿瘤。回顾性研究了所有接受腮腺肿瘤治疗的患者的超声检查结果和手术报告。八百六十八个腮腺病变形成了我们的研究样本。测量单位是腮腺咬肌筋膜和肿瘤浅表囊之间的最小距离，通过超声以毫米为单位。该参数的平均值对于浅叶肿瘤为 1.3 毫米，对于深叶肿瘤为 4.6 毫米（p< 0.001)。当截断值为 2.6 mm 时，超声的敏感性和特异性分别为 89.6% 和 88.4%。我们的研究表明，超声有助于术前区分腮腺浅叶和深叶肿瘤。