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This prospective, longitudinal study of patients with Chiari I malformation posterior fossa dural opening and duraplasty quantified the change in the posterior fossa and upper cervical spine morphometrics and determined the change in symptomatology between at baseline and up to 5 years postsurgery. The authors found that symptomatic and MR imaging morphometric changes occurred within the first postoperative year.

As chondrosarcoma and synovial chondromatosis of the temporomandibular joint share overlapping clinical and histopathologic features, CT and MR imaging can be helpful to differentiate between the 2 entities. High-risk imaging features for chondrosarcoma include the following: lesion centered on the mandibular condyle, destruction of the mandibular condyle, no destruction/sclerosis of the articular eminence/glenoid fossa, infiltration into the tendon of the lateral pterygoid muscle, absent or stippled calcification, periosteal reaction, internal enhancement, and size of ≥30.5 mm.