Abdel Razek Ahmed Abdel Khalek
From the Department of Diagnostic Radiology, Mansoura Faculty of Medicine, Mansoura, Egypt.
J Craniofac Surg. 2014 Jul;25(4):1354-7. doi: 10.1097/SCS.0000000000000819.
This study aims to describe the computed tomography (CT) and magnetic resonance (MR) imaging appearance of maxillofacial lesions in renal osteodystrophy.
We retrospectively reviewed the CT and MR imaging of maxillofacial region in 9 patients (6 females and 3 males with mean age of 31 yr) with renal osteodystrophy. They presented with facial swelling (n = 6), facial disfigurement (n = 2), and oral cavity mass (n = 1). They underwent CT and MR imaging of the maxillofacial region.
Brown tumors (n = 6) were seen in the mandible (n = 4) and maxilla (n = 2). They appeared as mixed lytic and sclerotic (n = 4) and sclerotic (n = 2) lesions at CT. The lesions appeared as hypointense at T1-weighted images and of mixed signal intensity at T2-weighted images with intense contrast enhancement (n = 6). Uremic leontiasis ossea (n = 2) appeared at CT as diffuse hyperostosis with protruded maxilla and obliterated sinus. At MR imaging, there was expansion of the maxilla with obliteration of the maxillary sinuses and protrusion of the mandible. The lesion exhibited low signal intensity at T1-weighed images. At T2-weighted images, the lesion showed low signal intensity with small hyperintense lesions. Dystrophic calcification (n = 2) was seen in the parotid and the check.
We concluded that CT and MR imaging are helpful for diagnosis and treatment planning of maxillofacial lesions of patients with renal osteodystrophy.
本研究旨在描述肾性骨营养不良患者颌面部病变的计算机断层扫描（CT）和磁共振（MR）成像表现。
我们回顾性分析了9例（6例女性，3例男性，平均年龄31岁）肾性骨营养不良患者颌面部的CT和MR成像。他们表现为面部肿胀（6例）、面部畸形（2例）和口腔肿物（1例）。他们均接受了颌面部的CT和MR成像检查。
在下颌骨（4例）和上颌骨（2例）发现棕色瘤（6例）。CT表现为溶骨性和硬化性混合（4例）及硬化性（2例）病变。病变在T1加权像上呈低信号，在T2加权像上呈混合信号强度，增强扫描强化明显（6例）。尿毒症性骨肥大（2例）在CT上表现为弥漫性骨增生，上颌骨突出，鼻窦闭塞。在MR成像上，上颌骨扩大，上颌窦闭塞，下颌骨突出。病变在T1加权像上呈低信号。在T2加权像上，病变呈低信号，伴有小的高信号灶。在腮腺和颊部可见营养不良性钙化（2例）。
我们得出结论，CT和MR成像有助于肾性骨营养不良患者颌面部病变的诊断和治疗规划。
