: 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.
The atlas typically categorizes skin conditions based on their sonographic signatures. 1. Benign and Malignant Tumors
: Ultrasound helps measure the depth (ultrasonographic Breslow index) and check for nearby satellite metastases. Atlas of Dermatologic Ultrasound
: Ultrasound is superior to clinical exams for staging, as it can detect subclinical fistulas and fluid collections.
: Vital for assessing blood flow in tumors, inflammation, and vascular malformations. 🏥 Clinical Applications : Standard dermatologic exams require probes of at
: Typically seen as hypoechoic (dark) lesions with irregular borders.
High-frequency ultrasound (HFUS) uses sound waves to create real-time images of the skin layers. : Vital for assessing blood flow in tumors,
: Differentiates solid tumors from fluid-filled cysts (anechoic) or fatty lipomas (often oval and hypoechoic). 2. Inflammatory Diseases