Due to embryonic failure of segmentation of tarsal bones. Forming connecting bar between tarsal bones commonly calcaneonavicular and talocalcaneum. Less common in talonavicular and calcaneocuboidal. 70 % bilateral in calcaneonavicular and 50 % bilateral in talocalcaneal.
Tarsal coalition can be in form of
- Fibrous bar
- Cartilage bar
- Bone bar
Genetically inherited as autosomal dominant
Associated congenital abnormalities
- Fibular hemimelia
Entries (RSS)