A 23 year old professional athlete with hindfoot pain (left). Conservative treatment with analgesics, an orthotic sole and shockwave therapy did not solve the complaints. Physical examination revealed swelling on the lateral and medial side of the insertion of the Achilles tendon

Picture 1: On MRI, a retrocalcaneal bursitis (1) was seen, as well as a small bone cyst dorsally in the calcaneus (2).

Endoscopic calcaneoplasty was performed and the cyst was opened and microfractured.

Picture 2: Posterolateral portal.

Picture 3: Scope in posteromedial portal.