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Ultrasound examination of the skin is becoming more and more important in dermatology. The use of noninvasive 20-MHz sonography is a well-established procedure in dermatology. It can be used to determine tumor thickness in malignant melanoma and basal cell carcinoma before treatment. The use of 20-MHz sonography permits the determination of skin thickness and density in patients with scleroderma and other connective tissue diseases. A reproducible evaluation of the effects of drugs on the skin is possible. In this article, Jemec and Gniadecka describe a new indication for using 20-MHz sonography in the diagnosis of hidradenitis suppurativa, a variant form of acne.
Plewig G. Clinical Implications. Arch Dermatol. 1997;133(8):970. doi:10.1001/archderm.1997.03890440036005