Computed Tomography and Magnetic Resonance Imaging of Maxillofacial Lesions in Renal Osteodystrophy

Purpose: This study aims to describe the computed tomography (CT) and magnetic resonance (MR) imaging appearance of maxillofacial lesions in renal osteodystrophy. Patients and Methods: 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. Results: 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. Conclusion: We concluded that CT and MR imaging are helpful for diagnosis and treatment planning of maxillofacial lesions of patients with renal osteodystrophy.