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Traumatic avulsion of the superior extensor retinaculum of the ankle as a cause of subperiosteal haematoma of the distal fibula in children. A retrospective study of 7 cases

Abstract : OBJECTIVE: To describe a new sonographic feature for a traumatic lesion of the ankle in children. METHODS: We present a retrospective review of superior extensor retinaculum (SER) avulsions diagnosed by ultrasound (US) as a cause of subperiosteal haematoma (SPH) and periosteal apposition of the distal fibula in seven children (3 girls and 4 boys, mean age 13.4 years; age range 10-15 years) after an inversion trauma of the ankle. Two children were subsequently examined with magnetic resonance imaging (MRI). RESULTS: At the acute phases (6 children), US showed a hypoechoic collection with periosteal elevation at the fibular insertion of the SER. The fibular cortex and growth plate were unremarkable. The SPH was isolated in three cases and associated with an anterior talofibular ligament sprain in four. In two cases, MRI confirmed the SER periosteal avulsion and the integrity of the distal fibula. At the later phase (one child), US showed a periosteal apposition at the fibular insertion of the SER with hypoechoic thickening of the SER and power Doppler hyperaemia. CONCLUSIONS: This is the first sonographic description of SER avulsion as cause of SPH of the distal fibula in children. SPH in children should not be considered as pathognomonic of a Salter-Harris type 1 lesion of the distal fibula. Later, it may be responsible for persistent ankle pain. Therefore, SER may be systematically explored in children during US examination of the ankle after trauma.
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https://hal.univ-lille.fr/hal-03357970
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Soumis le : mercredi 29 septembre 2021 - 10:19:18
Dernière modification le : mercredi 27 octobre 2021 - 06:01:09

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Juliette Ding, Antoine Moraux, Eric Nectoux, Xavier Demondion, Elisa Amzallag-Bellenger, et al.. Traumatic avulsion of the superior extensor retinaculum of the ankle as a cause of subperiosteal haematoma of the distal fibula in children. A retrospective study of 7 cases. Skeletal Radiology, Springer Verlag, 2016, Skeletal radiology, 45 (11), pp.1481-1485. ⟨10.1007/s00256-016-2454-z⟩. ⟨hal-03357970⟩

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