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Temporomandibular Joint 51
Figure 1.3.14 Temporal Bone Chondrosarcoma (Canine) MR
(a) T1, TP (b) T2, TP (c) T1+C, TP
(d) T1+C, DP
8y FS German Shepherd Dog with neurologic signs relating to left cerebral and thalamic disease. A large, locally invasive complex mass
arises from the temporal bone, with components extending intracranially and into the adjacent temporal musculature. Left temporal
bone medullary signal intensity is reduced on unenhanced T1 images (a: arrow) as a result of marrow displacement by the mass, and
cortical margins are attenuated. Multiple high intensity foci suggest the mass is multicameral and cystic (b). The mass is nonuniformly
contrast enhancing (c,d). Biopsy revealed a highly anaplastic chondrosarcoma.
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