Eruptive vellus hair cyst

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Eruptive vellus hair cysts (or EVHC) are small

milia. Histopathology is the basis of diagnosis. Retinoids
, surgery, and lasers are used as treatment modalities.

Signs/symptoms

Eruptive vellus hair cysts are small

milia
.

Cause

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 at 4–18 years of age.

Diagnosis

Histopathology is the basis of diagnosis. Stratified-squamous epithelium with a granular layer that surrounding a cystic space filled with laminated keratin and a variable number of vellus hair cysts is seen to be present.[3] It can be difficult to distinguish from other skin conditions, including molluscum contagiosum and acne vulgaris but can be corroborated with histopathology.[4]

Associations

It can be associated with Steatocystoma multiplex.[3]

Treatment

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.[5] The primary indication for treatment is cosmesis. Retinoids, surgery, and lasers are used as treatment modalities.[3]

See also

References

Further reading