Jadassohn’s nevus: rare course variants, diagnosis features and approaches to therapy (clinical cases)

Nevus of the sebaceous glands of Jadassohn is a congenital hamartoma, which is of interest to dermatologists with the possibility of benign and malignant degeneration during the patient's life. The article describes rare manifestations of nevus: a case of a cranial nevus with a late onset in adulthood, an extracranial nevus with a large area of distribution, a clinical and dermoscopic description of an advanced malignant cranial nevus. A detailed description of the stages of the course of the nevus, its dermoscopic and pathomorphological characteristics, and approaches to therapy are also given.