Imaging Sci Dent.  2021 Jun;51(2):149-154. 10.5624/isd.20200300.

Computed tomography and magnetic resonance imaging characteristics of giant cell tumors in the temporomandibular joint complex

• Choi YJ
• Lee C
• Jeon KJ
• Han SS

• KMID: 2527051
• DOI: http://doi.org/10.5624/isd.20200300

Abstract

Purpose
This study aimed to investigate the computed tomography and magnetic resonance imaging features of giant cell tumors in the temporomandibular joint region to facilitate accurate diagnoses.
Materials and Methods
From October 2007 to June 2020, 6 patients (2 men and 4 women) at Yonsei University Dental Hospital had histopathologically proven giant cell tumors in the temporomandibular joint. Their computed tomography and magnetic resonance imaging findings were reviewed retrospectively, and the cases were classified into 3 types based on the tumor center and growth pattern observed on the radiologic findings.
Results
The age of the 6 patients ranged from 25 to 53 years. Trismus was found in 5 of the 6 cases. One case recurred. The mean size of the tumors, defined based on their greatest diameter, was 32 mm (range, 15–41 mm). The characteristic features of all cases were a heterogeneously-enhancing tumorous mass with a lobulated margin on computed tomographic images and internal multiplicity of signal intensity on T2-weighted magnetic resonance images. According to the site of origin, 3 tumors were bone-centered, 2 were soft tissue-centered, and 1 was peri-articular.
Conclusion
Computed tomography and magnetic resonance imaging yielded a tripartite classification of giant cell tumors of the temporomandibular joint according to their location on imaging. This study could help clinicians in the differential diagnosis of giant cell tumors and assist in proper treatment planning for tumorous diseases of the temporomandibular joint.

Keyword

Diagnostic Imaging; Giant Cell Tumors; Magnetic Resonance Imaging; Temporomandibular Joint