Tamburrini Stefania, Brunetti Arturo, Brown Michèle, Sirlin Claude B, Casola Giovanna
Dip. Sc. Biomorfologiche e Funzionali, Universita' di Napoli Federico II, IBB-CNR, Via Pansini 5, 80131, Naples, Italy.
Eur Radiol. 2005 Oct;15(10):2096-103. doi: 10.1007/s00330-005-2784-z. Epub 2005 May 24.
The aims of this study were to identify (1) the normal range of the appendix on computed tomography (CT), (2) the correlation of patient age and sex with the visibility and appearance of the appendix on CT, and (3) the normal variations in wall thickness, intraluminal content, and location of the appendix. Three hundred seventy-two outpatients underwent abdominopelvic CT. The scans were reviewed on the picture archiving and communication system and appendiceal outer-to-outer wall diameter, wall thickness, location, content and its correlation with appendix diameter were analyzed. The appendix was visualized in 305/372 patients. Its location relative to the cecum was highly variable. The diameter range was 3-10 mm; in 42% of cases the diameter was greater than 6 mm. When the intraluminal content (185/305) was visualized, the diameter was slightly superior to the mean (p=0.0156). In 329 CT scans in which oral contrast material was given, the appendix was filled by contrast material in 74/329 patients. The appendix wall thickness was measurable in 22/305 patients (average 0.15 cm). There is significant overlap between the normal and abnormal CT appearance of the appendix. Consequently the diagnosis of acute appendicitis should be based not only on the appearance of the appendix but also on the presence of secondary signs.
（1）计算机断层扫描（CT）中阑尾的正常范围；（2）患者年龄和性别与CT上阑尾可见性及表现的相关性；（3）阑尾壁厚度、腔内内容物及位置的正常变异。372名门诊患者接受了腹部盆腔CT检查。在图像存档与通信系统上对扫描结果进行回顾，并分析阑尾外壁到外壁的直径、壁厚度、位置、内容物及其与阑尾直径的相关性。372例患者中有305例阑尾显影。其相对于盲肠的位置变化很大。直径范围为3 - 10毫米；42%的病例直径大于6毫米。当腔内内容物显影时（185/305），直径略高于平均值（p = 0.0156）。在329例给予口服对比剂的CT扫描中，74/329例患者的阑尾被对比剂充盈。305例患者中有22例可测量阑尾壁厚度（平均0.15厘米）。阑尾正常和异常CT表现之间存在显著重叠。因此，急性阑尾炎的诊断不仅应基于阑尾的表现，还应基于继发征象的存在。
