PMC3400396_01
T1 gadolinium-enhanced axial (a) and sagittal (b) magnetic resonance images show a solid tumor (arrow) proximate to the capsule of the right temporomandibular joint in the right preauricular region.
CRIM2012-121743.001.jpg
PMC3400396_01_CRIM2012-121743.001.jpg
fig1
TMJ (Figure 1). The lesion was isointense relative to muscle on T1-weighted images, hyperintense on T2-weighted images, and partially enhanced after gadolinium injection.
Intraoperative image shows en bloc excision of the tumor.
CRIM2012-121743.002.jpg
PMC3400396_01_CRIM2012-121743.002.jpg
fig2
The lesion was removed surgically via a preauricular incision under general anesthesia to determine the histopathological diagnosis. The lesion was independent of the parotid gland and was not in contact with either the TMJ or the cartilage of the acoustic meatus (Figure 2).
Histopathologically, (a) the tumor consists of hyaline cartilage and collagenous fibrous tissue (H&E stain, x40). (b) The hyaline cartilaginous tissue contains homogeneous chondrocytes with round nuclei and chondrocytic lacunae (H&E stain, x200).
CRIM2012-121743.003.jpg
PMC3400396_01_CRIM2012-121743.003.jpg
fig3
The tumor comprised mainly of hyaline cartilage, which contained chondrocyte with chondrocytic lacunae, with collagenous fibrous tissue in the center of lesion (Figure 3).