Presentation
Knee trauma.
Patient Data
Age: 18 years
Gender: Male
From the case:
Patella alta
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.
From the case:
Patella alta
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/48848/annotated_viewer_json?lang=us"}
.
Case Discussion
As seen on the lateral X-ray, the patella is high-riding or patella alta. The Insall-Salvati ratio is the way to determine borders of normal.
As measured at the X-ray, the ratio of patellar tendon length to the length of patella is 1.3, with 1.2 being the upper border of normally positioned patella.
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