Sumi M, Yamada T, Takagi Y, Nakamura T
Department of Radiology and Cancer Biology, Nagasaki University School of Dentistry, Nagasaki, Japan.
AJNR Am J Neuroradiol. 2007 Sep;28(8):1552-6. doi: 10.3174/ajnr.A0585.
The labial salivary gland is a site of occurrence of tumors and cysts, and it serves as the biopsy site for the diagnosis of Sjögren syndrome. However, its imaging features have not been well understood. Here we attempted to depict the labial gland by high-resolution MR imaging.
The labial glands from 89 patients without Sjögren syndrome, 14 patients with Sjögren syndrome, and 3 patients with tumor or cyst of the lips were imaged by using a 1.5T MR imager with a 47- or 110-mm surface coil.
The upper and lower labial glands consisted of 1-3 layers of gland clusters, each of which had high signal intensity on T1-weighted and fat-suppressed T2-weighted images and was readily enhanced after gadolinium injection. The posterior parts of the glands were thicker than the anterior parts. The gland areas in the lower lips (186 +/- 64 mm(2) in women and 192 +/- 68 mm(2) in men) were greater than those in the upper lips (140 +/- 46 mm(2) in women and 162 +/- 66 mm(2) in men). We did not find any significant age-related changes or sex differences in the gland area. The labial gland areas were smaller in the patients with Sjögren syndrome than in patients without Sjögren syndrome, though the difference was significant only in the upper lips (104 +/- 53 mm(2)).
This is the first report describing imaging features of the labial salivary glands. High-resolution MR imaging can readily delineate the labial glands.
唇唾液腺是肿瘤和囊肿的好发部位，也是诊断干燥综合征的活检部位。然而，其影像学特征尚未得到充分认识。在此，我们尝试通过高分辨率磁共振成像描绘唇腺。
使用配备47或110毫米表面线圈的1.5T磁共振成像仪，对89例无干燥综合征的患者、14例干燥综合征患者以及3例唇部肿瘤或囊肿患者的唇腺进行成像。
上下唇腺由1 - 3层腺簇组成，在T1加权像和脂肪抑制T2加权像上各层均呈高信号强度，注射钆后易于强化。腺体后部比前部厚。下唇的腺体面积（女性为186±64平方毫米，男性为192±68平方毫米）大于上唇（女性为140±46平方毫米，男性为162±66平方毫米）。我们未发现腺体面积有任何显著的年龄相关变化或性别差异。干燥综合征患者的唇腺面积小于无干燥综合征的患者，尽管仅在上唇差异有统计学意义（104±53平方毫米）。
这是首篇描述唇唾液腺影像学特征的报告。高分辨率磁共振成像能够清晰勾勒唇腺。
