Comparison of Insall-Salvati ratios in children with an acute anterior cruciate ligament tear and a matched control population.

Objective: An anterior cruciate ligament (ACL) injury is an increasingly recognized cause of knee pain in young patients and in athletes in particular and can be detected non-invasively with MRI. Anecdotal information suggests that patella alta may be more common in the setting of this injury, but no study has documented this phenomenon. This study sought to test whether an ACL tear is associated with an increased Insall-Salvati ratio suggestive of patella alta.

Narrowing of Meckel's cave and cavernous sinus and enlargement of the optic nerve sheath in Pseudotumor Cerebri.

Objective: Pseudotumor cerebri (PTC) is a clinical entity of uncertain etiology associated with several subtle findings on magnetic resonance imaging (MRI) including posterior flattening of the globes, enlargement of the optic nerve sheath (ONS), empty sella sign. We aimed to characterize the incidence of and significance of 2 novel MRI findings: narrowing of Meckel's cave and of cavernous sinus.

Methods: Forty-six patients with a condition diagnosed as PTC based on clinical history were retrospectively reviewed, and their MRI studies were assessed for previously reported imaging findings associated with PTC.