Presentation
Right ankle pain and limitation of movement.
Patient Data
Age: 25 years
Gender: Male
From the case:
Talocalcaneal coalition
{"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/29330/annotated_viewer_json?_c=1699858529\u0026lang=us"}
Bony fusion of the middle subtalar joint with talar beak sign from excessive stress on the joint typical for talocalcaneal coalition.
From the case:
Talocalcaneal coalition
{"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/29331/annotated_viewer_json?_c=1699858529\u0026lang=us"}
The black circle refers to the bony fusion of the sustentaculum tali and talar middle facet.
The red arrows refers to the talar beak sign from excessive joint stress
Case Discussion
Talocalcaneal coalition is a developmental condition resulting in fibrous or bony fusion of the talus and calcaneous that mostly involves the middle subtalar joint and causes chronic ankle pain. It is one form of tarsal coalition.