: Differentiates solid tumors from fluid-filled cysts (anechoic) or fatty lipomas (often oval and hypoechoic). 2. Inflammatory Diseases
: Typically seen as hypoechoic (dark) lesions with irregular borders. Atlas of Dermatologic Ultrasound
: Ultrasound helps measure the depth (ultrasonographic Breslow index) and check for nearby satellite metastases. Atlas of Dermatologic Ultrasound