J Korean Acad Oral Maxillofac Radiol.  1998 Aug;28(2):505-519.

Diagnostic Imaging for a Case of Pigmented Villonodular Synovitis of the Temporomandibular Joint

• Song MY
• Lee KH
• Lee SC
• Lee SS
• Choi SC
• Park TW
• You DS

Abstract

The occurrence of PVNS in the TMJ is very rare. We report a case of PVNS which was misdiagnosed as a parotid tumor at first. CT and conventional radiograph revealed a well difined mass demonstrating higher attenuation than adjacent soft tissue. Erosion, expansion of the cortical plate of the mandibular condyle and sclerotic change beneath the margin of the lesion were also shown. MRI demonstrated well defined mass of very low signal intensity on both T1 and T2 image due to ferromagnetic effect and more clearly delineated the extent of the lesion. Ultrasonogram showed homogenous hypoechoic lesion growing toward both condyle and adjacent soft tissue. Histopathologic findings and characteristic appearance of the various imaging method were discribed and the usefulness of these image for diagnosis and pretreatment evaluation of the PVNS were also discussed on this paper.

MeSH Terms

Diagnosis
Diagnostic Imaging*
Magnetic Resonance Imaging
Magnets
Mandibular Condyle
Synovitis, Pigmented Villonodular*
Temporomandibular Joint*
Ultrasonography