Department of Otolaryngology, Osaka Medical College, Takatsuki, Japan.
Head Neck. 2013 Aug;35(8):1153-7. doi: 10.1002/hed.23103. Epub 2012 Aug 21.
The purpose of this study was to prepare the ultrasonographic diagnostic criteria on parotid tumors for preoperative differentiation of superficial and deep tumors.
We evaluated 154 patients with a benign parotid tumor who underwent surgery. The minimum thickness of normal parotid gland tissue between the parotideomasseteric fascia and tumor (minimum fascia-tumor distance [MFTD]) was measured on preoperative ultrasonography and compared among tumors at different locations, and the optimum cutoff value to differentiate a deep tumor was identified.
The MFTD showed significant differences between superficial and deep tumors and between inferior pole and deep tumors. The sensitivity, specificity, and accuracy of an MFTD ≥3 mm for the differentiation of deep tumors were 85%, 91%, and 89%.
A tumor with an MFTD ≥3 mm on preoperative ultrasonography is very likely to be a deep tumor based on a new differentiation method for deep parotid tumors considering those present at other locations.
本研究旨在制定超声诊断腮腺肿瘤的标准，以便术前区分浅部和深部肿瘤。
我们评估了 154 例接受手术的良性腮腺肿瘤患者。在术前超声检查中测量腮腺咬肌筋膜与肿瘤之间的正常腮腺组织最小厚度（最小筋膜-肿瘤距离[MFTD]），并比较不同部位肿瘤之间的 MFTD，确定区分深部肿瘤的最佳截断值。
MFTD 在浅部和深部肿瘤之间以及下极和深部肿瘤之间存在显著差异。MFTD≥3mm 对深部肿瘤的鉴别诊断的灵敏度、特异度和准确度分别为 85%、91%和 89%。
根据一种新的区分深部腮腺肿瘤的方法，术前超声检查中 MFTD≥3mm 的肿瘤很可能是深部肿瘤，无论其位于其他部位。
