The treatment strategy of displaced intra-articular calcaneal fracture has been controversial. However, most surgeons agree on the surgical intervention for the case sustaining incongruity of the subtalar joint in order to obtain better outcomes [1,2]. Traditionally, accurate reduction of the subtalar joint requires an invasive approach through the thin, vulnerable skin which overlays the lateral calcaneal wall, and such conditions are frequently accompanied by a higher incidence of wound complications [1,2]. Less invasive closed reduction of the posterior facet under fluoroscopic assistance is one method which can avoid wound complication. However, it lacks the accuracy to acceptably restore the position of the posterior facet. Recently, a few studies which have applied subtalar arthroscopy via two or three lateral portals for reduction of the posterior facet have achieved a less invasive restoration with good prognosis [[3], [4], [5], [6], [7]].

In 2000, van Dijk et al. developed a two-portal posterior arthroscopic approach with the patient in the prone position. This technique can provide excellent access to the posterior ankle compartment, subtalar joint, and extra-articular structures [8]. Although the effectiveness of the technique for posterior ankle impingement syndrome and subtalar arthrodesis has been well reported [[8], [9], [10], [11]], to the best of our knowledge, there has been no report in which the technique was applied for the reduction of a displaced intra-articular calcaneal fracture.

We report here a case of displaced intra-articular calcaneal fracture in an 11-year-old boy treated via two-portal posterior arthroscopic reduction with percutaneous fixation, which achieved a good result. Written informed consent was obtained from the patient and his parents for publishing this case report, including the images.