A, Harris-Beath axial calcaneal (coalition) view to identify middle facet tarsal coalition. Note normal middle facet on right and incomplete middle facet coalition on left. B, Lateral radiograph of hindfeet of same patient. Note normal middle and posterior facets on right but following conditions on left: loss of normal “space” at middle facet, rounding of lateral process of talus, and sclerotic semicircle in calcaneus inferior to middle facet, representing overlap of cortical margins of sustentaculum and bony bar.