Tarsal coalition
also Flatfoot differential dx

• Due to calcaneal navicular or talo-calcaneal bars (abnormal connection – bony or cartilaginous)
• Often have repeated ankle sprains and strains with athletic activity. Often causes pain.
• Exam: decreased subtalar motion.
• Diagnose by x-ray (oblique view) or CT (especially for talo-calcaneal)
• Treatment: short leg walking cast for 3 weeks followed by referral to Ortho for possible arthroplasty or arthrodesis

CHLA Board Review 2005