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Fig. 6B. —33-year-old man with acute trauma of left wrist and high suspicion of scaphoid fracture. High-resolution sonogram obtained in sagittal plane shows hyperechogenic line (arrowheads), parallel to scaphoid cortex that is more likely related to positive echo signal of anterior interface of cartilage induced by high gain level than to subperiosteal hematoma, because scaphoid is almost entirely covered with cartilage.