MacDonald-Jankowski D S, Yeung R, Li T K, Lee K M
Division of Oral and Maxillofacial Radiology, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Canada.
Dentomaxillofac Radiol. 2004 Mar;33(2):114-8. doi: 10.1259/dmfr/30164354.
Fibrous dysplasia (FD) is an uncommon, but important lesion affecting the jaws. The aim of this study was to reveal its presentation on computed tomography (CT) in a consecutive series of cases.
The files of the Department of Oral and Maxillofacial Surgery of Hong Kong University between 1989 and 2000 were reviewed for cases of FD.
Of the ten cases investigated by CT, two were rejected because of extensive biopsy or surgery before the CT investigation. Seven of the remaining eight cases were Chinese and one was Indian. The mandible and maxilla were equally affected. The cortex was generally intact, except when adjacent to the teeth in the maxilla. The margins were generally poorly-defined, but well-defined on at least some sections of each maxillary case. Five cases were extensive, affecting or nearly affecting the whole hemi-mandible or hemi-maxilla to the midline. All cases displayed expansion, which was fusiform in the mandible and an enlargement of the normal contour in the maxilla. The maxillary antrum was completely obturated in three maxillary cases; one displayed a rounded dome-shaped lesion more suggestive of a benign neoplasm. The orbital floor was displaced in three cases; one of those cases presented with proptosis. All maxillary cases extended back to the pterygoid process, but did not displace it. The "bone windows" of eight cases generally displayed a "ground-glass" pattern; one also displayed cyst-like radiolucencies. The soft tissue window, which depicts mineralized tissue as "white", showed that five cases were completely mineralized.
CT can be used to determine the extent, specific dimensions and radiodensity of FD.
骨纤维异常增殖症（FD）是一种累及颌骨的少见但重要的病变。本研究旨在揭示其在一系列连续病例中的计算机断层扫描（CT）表现。
回顾香港大学口腔颌面外科1989年至2000年期间的FD病例档案。
在接受CT检查的10例病例中，2例因在CT检查前进行了广泛活检或手术而被排除。其余8例中7例为中国人，1例为印度人。下颌骨和上颌骨受累情况相同。皮质通常完整，上颌骨中与牙齿相邻处除外。边界通常不清，但在上颌骨各病例的至少某些层面上边界清晰。5例病变范围广泛，累及或几乎累及整个半侧下颌骨或半侧上颌骨直至中线。所有病例均有膨隆，下颌骨呈梭形，上颌骨为正常轮廓增大。3例上颌骨病例中上颌窦完全闭塞；1例显示为圆形穹顶状病变，更提示为良性肿瘤。3例眶底移位；其中1例伴有眼球突出。所有上颌骨病例均向后延伸至翼突，但未使其移位。8例病例的“骨窗”通常显示“磨玻璃”样表现；1例还显示出囊肿样透亮区。软组织窗将矿化组织显示为“白色”，表明5例完全矿化。
CT可用于确定FD的范围、具体尺寸和放射密度。
