Echographie des pathologies du coude

Ultrasound Features of Ankle Retinacula: Normal Appearance and Pathologic Findings

“…Normal AR appear as thin hyperechoic fibrillar bands overlying tendons, with a thickness of approximately 1 mm . Retinacula are better depicted by US in their longitudinal plane, when the underlying tendons are imaged in their short axis (Figure A) . Dynamic maneuvers applying stress on AR are required to optimally judge their function.…”

“…Extensor retinaculum injuries may be observed in forceful dorsal flexion of the foot (Figure ) . Extensor retinacula are thought to have a role in tibialis anterior tendon tears.…”

“…The triangular FR forms the roof of the tarsal tunnel. It originates at the tip of the medial malleolus and extends posteriorly to the posterosuperior aspect of the medial calcaneus …”

“…2,3 Retinacula are better depicted by US in their longitudinal plane, when the underlying tendons are imaged in their short axis (Figure 2A). 2,4,5 Dynamic maneuvers applying stress on AR are required to optimally judge their function. Stress is applied during a real-time examination while forcing the ankle to stretch the examined retinaculum or trying to produce instability of the underlying tendons.…”

“…Retinacula are focal thickenings of the deep fascia, which maintain tendons in place during muscle contraction, preventing bowstringing . Due to the high mechanical overload on the ankle during sports practice and frequent acute trauma and repetitive microtrauma of ankles, ankle retinacula (AR) disorders are frequent in routine practice, but they are probably underreported in literature . Ultrasound (US) is particularly effective in showing AR because of their superficial course and thanks to its high spatial resolution.…”