MacDonald-Jankowski D S, Yeung R W K, Li T, Lee K M
Department of Oral Radiology, Dental School, University of Bergen, Bergen, Norway.
Clin Radiol. 2004 Mar;59(3):281-7. doi: 10.1016/j.crad.2003.09.024.
The aim of this study was to determine the computed tomography (CT) presentation of odontogenic myxoma (OM) in a Chinese population and to compare them with those observed on the accompanying conventional radiographs (CR).
The files of the Department of Oral and Maxillofacial Surgery of the University of Hong Kong between 1989 and 2000 were reviewed for myxoma cases.
Ten cases of OM were found of which eight had been investigated by CT. The formatted hard copy was found in seven cases, four in the maxilla and three in the mandible. Most of the OMs had a round shape but one was fusiform. CT was more likely to display a cortex and its perforation. All OMs had perforated cortices on CT with soft tissue appearing outside the bony contour in two cases. Contrast enhancement was apparent in six cases. Both CR and CT displayed septae, but the latter method revealed that most septae were situated at the periphery, presenting as "sunray" type spicules in one case. Tooth displacement and root resorption were more reliably observed on CR.
The likelihood of perforation and pattern of septa of OM is better displayed by CT. CR should also allow a better assessment of the degree of definition of the lesion's margins with adjacent normal bone. Therefore, both CT and CR should be used in an investigation of an OM.
本研究旨在确定牙源性黏液瘤（OM）在中国人群中的计算机断层扫描（CT）表现，并将其与相应的传统X线片（CR）所见进行比较。
回顾香港大学口腔颌面外科1989年至2000年间的黏液瘤病例档案。
共发现10例OM，其中8例接受了CT检查。7例有格式化的硬拷贝，上颌4例，下颌3例。大多数OM呈圆形，但1例为梭形。CT更易显示皮质及其穿孔情况。所有OM在CT上均有皮质穿孔，2例软组织出现在骨轮廓之外。6例有明显的对比增强。CR和CT均显示有分隔，但后者显示大多数分隔位于周边，1例呈“日光”型针状。CR能更可靠地观察到牙齿移位和牙根吸收情况。
CT能更好地显示OM的穿孔可能性和分隔模式。CR也能更好地评估病变边缘与相邻正常骨的清晰程度。因此，在OM的检查中应同时使用CT和CR。
