We report a case of an extra-articular talocalcaneal coalition located anterolateral to the sinus tarsi. As non-osseous coalitions can be difficult to diagnose, physicians should keep this variant in mind in cases of a symptomatic hind foot with apparently equivocal radiological findings.
HarrisRI. Retrospect–peroneal spastic flat foot (rigid valgus foot). J Bone Joint Surg Am1965;47:1657–67.
5.
NewmanJSNewbergAH. Congenital tarsal coalition: Multimodality evaluation with emphasis on CT and MR imaging. Radiographics2000;20:321–32.
6.
McNallyEG. Posteromedial subtalar coalition: Imaging appearances in three cases. Skeletal Radiol1999;28:691–5.
7.
WechslerRJSchweitzerMEDeelyDMHornBDPizzutilloPD. Tarsal coalition: Depiction and characterization with CT and MR imaging. Radiology1994;193:447–52.
8.
TurhanAUDincHAydinHAynaciO. An accessory ossification centre in the calcaneus with talonavicular and second metatarsocuneiform coalitions. Eur Radiol1999;9:481–2.
9.
SolomonLBRuhliFJTaylorJFerrisLPopeRHennebergM. A dissection and computer tomograph study of tarsal coalitions in 100 cadaver feet. J Orthop Res2003;21:352–8.
