Signs of a desmoid tumor depend on where it is. If it's close to the surface of your skin, you may have a painless or slightly painful lump. Ultrasound: High-frequency sound waves are used to make ...

Ultrasound close ultrasoundSound with a frequency greater than 20,000 Hz (20 kHz). waves have a frequency higher than the upper limit for human hearing – above 20,000 Hertz (Hz). Different ...