Which term describes a structure or lesion with a "bumpy" border, resembling a bunch of grapes?

The term "lobulated" accurately describes a structure or lesion with a "bumpy" border that resembles a bunch of grapes. In medical imaging, particularly in ultrasound, lobulation indicates that a lesion has multiple rounded or lumpy contours, which creates a characteristic appearance. This term is often utilized when differentiating various types of lesions or structures, as the lobulated appearance can provide important diagnostic clues.

In contrast, "complex" generally refers to structures that have both solid and cystic components, without directly indicating a bumpy or lobulated margin. "Hyperechoic" and "hypoechoic" refer to the echogenicity of a lesion—hyperechoic structures reflect more ultrasound waves and appear brighter, while hypoechoic structures reflect fewer waves and appear darker. These terms do not inherently denote the shape or margin of a lesion, which is why "lobulated" is the most suitable choice for describing a bumpy border similar to grapes.