Hx: subacute onset (weeks) of the pain seen in athletes esp. runners (banked or uneven surfaces).
PE: Tenderness to palpation posterior to the lateral malleolus or over the course of the tendon. Pain worse with resisted ankle eversion from a dorsiflexed postion. Examine for subluxation of tendon.
The diagnosis is made from the above and does not require imaging.
Tx: Rest, conservative care, physical therapy (eccentric exercise focus), ankle taping or lace up brace. Severe cases may even require a walking boot.
