Yonetsu K, Yuasa K, Kanda S
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kyushu University, Fukuoka, Japan.
Dentomaxillofac Radiol. 1996 Apr;25(2):97-102. doi: 10.1259/dmfr.25.2.9446980.
To evaluate the normal variation in size of the submandibular gland from computed tomographic (CT) scans.
CT was performed parallel to the Frankfurt horizontal (FH) and mandibular (MP) planes in 130 subjects (64 men and 66 women) with healthy submandibular glands, six patients with sialoadenitis and four with masseteric hypertrophy.
The mean (s.d.) maximum cross-sectional area (MCSA) of the submandibular glands for FH was 324 (89) mm2 and for MP 364(101) mm2. There was a high correlation between individuals' right and left glands. There was no significant difference in the mean MCSA between the right and left, which varied by less than 10%. The mean (s.d.) volume of the gland was 8072 (2574) mm3. With a high correlation with mean MCSA in both scanning planes, the mean MCSA may be an indicator of the volume of the gland. MCSA increased significantly with body height, weight and body mass index, but decreased with age. The MCSA of the affected side in patients with sialoadenitis and masseteric hypertrophy was larger than both that of the normal side and the predicted values.
MCSA is a useful indicator of gland volume, and differences of greater than 10% between the two sides may be used in the diagnosis of submandibular gland disease.
通过计算机断层扫描（CT）评估下颌下腺大小的正常变异。
对130名下颌下腺健康的受试者（64名男性和66名女性）、6名涎腺炎患者和4名咬肌肥大患者进行与法兰克福水平面（FH）和下颌平面（MP）平行的CT扫描。
FH平面上下颌下腺的平均（标准差）最大横截面积（MCSA）为324（89）mm²，MP平面为364（101）mm²。个体左右腺体之间存在高度相关性。左右两侧的平均MCSA无显著差异，差异小于10%。腺体的平均（标准差）体积为8072（2574）mm³。在两个扫描平面上，平均MCSA与腺体体积高度相关，平均MCSA可能是腺体体积的一个指标。MCSA随身高、体重和体重指数显著增加，但随年龄下降。涎腺炎和咬肌肥大患者患侧的MCSA大于正常侧和预测值。
MCSA是腺体体积的一个有用指标，两侧差异大于10%可用于诊断下颌下腺疾病。
