Eruptive vellus hair cyst
Encyclopedia
Eruptive vellus hair cysts (or EVHC) are small lesion
s that occur most often in the chest wall, abdomen
and extremities, often with a crusted surface. EVHC may occur randomly, or it can be inherited as an autosomal dominant trait. The condition affects males and females equally, and sporadic cases usually appear between 4–18 years of age. The cysts appear similar clinically to steatocystoma multiplex
, as well as acneiform eruption
s and milia
. Therapeutic techniques that are safe and effective are rare, with incision and drainage being the primary form of treatment when sporadic regression does not occur.
Lesion
A lesion is any abnormality in the tissue of an organism , usually caused by disease or trauma. Lesion is derived from the Latin word laesio which means injury.- Types :...
s that occur most often in the chest wall, abdomen
Abdomen
In vertebrates such as mammals the abdomen constitutes the part of the body between the thorax and pelvis. The region enclosed by the abdomen is termed the abdominal cavity...
and extremities, often with a crusted surface. EVHC may occur randomly, or it can be inherited as an autosomal dominant trait. The condition affects males and females equally, and sporadic cases usually appear between 4–18 years of age. The cysts appear similar clinically to steatocystoma multiplex
Steatocystoma multiplex
Steatocystoma multiplex is a benign, autosomal dominant congenital condition resulting in multiple cysts on a person's body....
, as well as acneiform eruption
Acneiform eruption
Acneiform eruption refers to a group of dermatoses including acne vulgaris, rosacea, folliculitis, and perioral dermatitis. Restated, acneiform eruptions are follicular eruptions characterized by papules and pustules resembling acne....
s and milia
Milia
A Milium , also called a milk spot or an oil seed, is a keratin-filled cyst that can appear just under the epidermis or on the roof of the mouth. Milia are commonly associated with newborn babies but can appear on people of all ages...
. Therapeutic techniques that are safe and effective are rare, with incision and drainage being the primary form of treatment when sporadic regression does not occur.