Sebaceous hyperplasia

Common card · No. 327593

Sebaceous hyperplasia is a disorder of the sebaceous glands in which they become enlarged, producing flesh-colored or yellowish, shiny, often umbilicated bumps. Sebaceous hyperplasia, primarily affecting older patients in high-concentration areas like the face, head, and neck, typically has a 2-4 mm diameter and causes no symptoms. The lesions are often surrounded by telangiectatic blood vessels, also known as "crown vessels," and a central dell, which is in line with the origin of the lesions. Sebaceous glands are glands located within the skin and are responsible for secreting an oily substance named sebum. They are commonly associated with hair follicles but they can be found in hairless regions of the skin as well. Their secretion lubricates the skin, protecting it from drying out or becoming irritated. Studies in mice suggest topical irritants and carcinogens may contribute to sebaceous hyperplasia development, with immunosuppression with cyclosporin A or HIV infection increasing the...

Read on Wikipedia · Image Klaus D. Peter, Wiehl, Germany, CC BY 3.0 de