Case Reports and Series| Volume 56, ISSUE 6, P1323-1327, November 2017

Fibulocalcaneal Impingement in a Growing Child With Otherwise Asymptomatic Talocalcaneal Coalition


      Subfibular impingement has been described in patients with flatfoot. It possibly occurs with valgus deformity associated with talocalcaneal coalition. We observed symptomatic unilateral fibular impingement initially on the left foot of an 11-year-old female with an otherwise asymptomatic bilateral talocalcaneal coalition. From the age of 8 years, she had complained of pain around the left fibular tip. Magnetic resonance imaging showed a partial talocalcaneal coalition. At 10 years of age, it was questioned whether the pain was related to the coalition. However, imaging of the asymptomatic right foot also showed a talocalcaneal coalition, with the coalition in both feet appearing equal. Additionally, the peroneal trochlea appeared particularly prominent, more so on the left than on the right foot. Therefore, the symptoms were suspected to have been caused only by fibulocalcaneal impingement owing to a relatively long fibula. Subperiosteal shortening of the fibula was performed at when she was 11 years old. A bed for the peroneal tendons was created around the remaining epiphysis of the fibula, and the fibular ligaments were reattached with Arthrex® anchors (Arthrex, Naples, FL). At 14 months postoperatively, the patient was free of pain with unrestricted movement, although the follow-up imaging studies showed complete bony fusion on the medial aspect of the coalition between the talus and calcaneus. Approximately 1.5 years after surgery, our female patient at 12.5 years old complained of the same problems on her right foot, definitely occurring only around the fibula. The same procedure was performed as she had undergone on the left foot. At the last follow-up examination, she was asymptomatic 2.5 years after the initial surgery of the left foot and 11 months after surgery on the right. Talocalcaneal coalition can cause moderate to severe hindfoot deformity, leading to fibulocalcaneal impingement. Hence, treatment should be determined accordingly.

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