Abstract
Ultrasound sonography, plain X-ray, computed tomography, and magnetic resonance imaging are useful for the diagnosis of subcutaneous disorders, especially soft tissue tumors. Among them, high-frequency ultrasound probe sonography (15-30MHz) is the most useful, because it can show not only subcutaneous lesions but also dermal and epidermal lesions. In this chapter, the basic principle of ultrasound sonogpraphy and the typical and characteristic findings of common cutaneous and subcutaneous skin tumors are summed up.[Skin Cancer (Japan) 2009 ; 24 : 472-480]
