: Typically seen as hypoechoic (dark) lesions with irregular borders.
: Ultrasound helps measure the depth (ultrasonographic Breslow index) and check for nearby satellite metastases. Atlas of Dermatologic Ultrasound
High-frequency ultrasound (HFUS) uses sound waves to create real-time images of the skin layers. : Typically seen as hypoechoic (dark) lesions with
: Standard dermatologic exams require probes of at least 15 MHz ; ultra-high frequency (UHFUS) can reach up to 70 MHz for viewing minute structures like hair tracts. Layer Echogenicity : Epidermis : Appears as a bright, hyperechoic line. : Standard dermatologic exams require probes of at
An is a critical visual guide used by dermatologists and radiologists to diagnose skin, hair, nail, and soft tissue conditions non-invasively. It bridges the gap between clinical appearance and internal anatomy, often providing "skin deep" knowledge that the naked eye cannot see. 🔬 Fundamental Principles
: Differentiates solid tumors from fluid-filled cysts (anechoic) or fatty lipomas (often oval and hypoechoic). 2. Inflammatory Diseases