Case report: bilateral ankle pain in an aerobic dancer.

A 32-yr-old female presented to Sports Clinic with bilateral ankle pain and swelling following the initiation of an aerobic dance program 3 months earlier. Physical exam revealed bilateral ankle edema and the recent appearance of discrete tender nodules on her anterior tibias, consistent with erythema nodosum (EN). As part of her evaluation, chest radiographs were performed and demonstrated bilateral hilar adenopathy. This case discusses the evaluation of the patient with joint involvement, EN, and hilar adenopathy. The increased accessibility of sports medicine clinics makes it incumbent on the physician to be familiar with a wide range of differential diagnoses.