Sinus Tarsi Syndrome

• A painful syndrome of the ankle normally due to an inversion injury.  Results in pain along the lateral side of the ankle.
• Often misdiagnosed as an ankle sprain.
• Will have pain localized to the sinus tarsi (inferior and anterior to the anterior border of the lateral malleolus.
• Can be diagnosed by injecting lidocaine into the sinus tarsi, which should completely relieve the pain.
• Treatment consists of
  • NSAIDs
  • Ankle immobilization
  • Physical therapy
  • Oral or injected steroids in resistant cases