Ultrasound imaging of nails.

The nail apparatus contains tissues of various echogenicities and is thus well suited for ultrasound examination. Furthermore, ultrasonography is widely available and non-invasive and may therefore be used for longitudinal studies of tissues and diseases. Characteristic ultrasound pictures can be seen in psoriasis, cysts, vascular abnormalities,and other nail diseases. Ultrasound examination can visualize and quantify morphologic and functional aspects of nail biology.