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Its collagen\u2010dense architecture forms a resilient and adaptive continuum that varies in thickness, fiber orientation and anchoring patterns from the thigh to the foot. Recently, the use of high\u2010resolution ultrasonography, supported by anatomical and histological evidence, revealed more intricate organization than traditionally illustrated. This is particularly true in the distal leg and ankle, where lattice\u2010like fiber arrangements, retinacular thickenings and deep anchoring bands form a dynamically integrated support system. These features confirm the functional continuity of fascial layers throughout the limb and their relevance in maintaining tendon alignment\u2014modulating load transfer and stabilizing the ankle\/foot complex. This paper provides a concise and systematic guide to the sono\u2010anatomy of lower\u2010limb deep fasciae. 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