Presentation
Lateral ankle pain. No history of trauma.
Patient Data
Age: 55 years
Gender: Female
From the case:
Peroneus quartus muscle
{"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/18560/annotated_viewer_json?_c=1696821413\u0026lang=us"}
There is a third myotendinous structure within the peroneus tendon sheath postero-medial to the longus and brevis tendons, that can be followed down to the retrotrochlear eminence of the calcaneus.
Case Discussion
Typical position of the peroneus quartus accessory muscle.