Skin ultra-sound: Its history and advances.

Skin ultrasound imaging has proven its complementarity with in vivo dermatoscopic and microscopic clinical dermatological examination in obtaining additional informations on the deep component of different skin pathologies. It is a reliable and non-invasive tool for evaluating the overall morphology of skin tumors or other pathologies such as Verneuil's disease or other cystic pathologies.This article resumes the history of skin ultrasound imaging, its technical specificities and its practical uses. Optical imaging is not discussed, for which an article has already been devoted to it.