Which term refers to a solid lesion in sonography?

The term that refers to a solid lesion in sonography is "solid." In sonographic imaging, lesions can be categorized as solid or cystic based on their internal composition and echogenicity. A solid lesion is one that is composed of tissue and typically appears more homogeneous and often denser than surrounding structures.

Sonographically, solid lesions often exhibit varying degrees of echogenicity, which describes how much sound is reflected back. They may appear either hyperechoic (brighter on the ultrasound) or hypoechoic (darker) compared to the surrounding tissues. Understanding the characteristics of a solid lesion is crucial for proper diagnosis and management, as they may represent different pathological conditions ranging from benign to malignant.

The other terms listed describe different characteristics:

• A "complex" lesion typically contains both solid and cystic components, indicating a mixture rather than being solely solid.

• "Hyperechoic" refers specifically to a characteristic of tissue that reflects more ultrasound waves, resulting in a brighter appearance, but does not inherently imply the lesion is solid.

• "Cystic" refers to a lesion that contains fluid or is fluid-filled, which is distinct from a solid lesion that does not have such fluid content.

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