Diffuse

Lacking a distinct border, not localized, spread out. Opposite of circumscribed. Widely spread; not localized or confined. Example: Cancer treatment depends on whether the tumor is diffuse (spread throughout the brain) or focal (in one area of the brain).

Doppler Ultrasonography

An application of diagnostic ultrasound used to detect moving blood cells or other moving structures and measure their direction and speed of movement. The Doppler effect is used to evaluate movement by measuring changes in frequency of the echoes reflected from...

Edema

An accumulation of an excessive amount of watery fluid in cells, tissues, or serous cavities (swelling). Edema means swelling by an excessive amount of watery fluid accumulated in the intercellular spaces, most commonly present in subcutaneous tissue. It usually...