East Central Indiana
09/23/2017
Medical Dermatology

Dermatofibromas

  • Dermatofibroma
    A dermatofibroma forms in the layer of skin below the epidermis, which is called the dermis, and it is a growth of the dermis’s fibrous tissues. They are generally very small and are not often harmful. These growths are also called histiocytomas. Dermatofibromas are benign tumors of the skin.

About

Dermatofibroma

A dermatofibroma forms in the layer of skin below the epidermis, which is called the dermis, and it is a growth of the dermis’s fibrous tissues. They are generally very small and are not often harmful. These growths are also called histiocytomas.

Dermatofibromas are benign tumors of the skin that have the following characteristics:

  • Often on the extremities.
  • Firm, hyperpigmented dome-shaped papules.
  • May be tan to pink in patients with lightly pigmented skin.
  • Peripheral rim of darkening pigment is common.

Causes

The cause for dermatofibromas is not known, although it has been proven that they are not hereditary. They are most commonly found as a result of a small skin abrasion due to being scratched by something or bitten by an insect.

Risk Factors

Dermatofibromas are typically found in young to middle age adults, those in their twenties and thirties. Also, they are seen much more often in women than in men.

While they are usually only seen on legs, dermatofibromas can be found at any place on the body. They are commonly found in women and are usually very small in diameter as they are often less than a centimeter. Normally, only one will appear on the body, while it is possible to have several. They can be different colors, usually pink or brown. Dermatofibromas have a rubber-like feel to them and are felt under the skin. Like most skin abrasions, they itch or cause slight discomfort if they are touched or bumped. Since they are commonly found on the legs, they often bleed when they are shaved over.

Diagnosis

If a person is worried about a bump like this, a dermatologist should be able to diagnose it visibly. While they are not often harmful, dermatofibromas ca be removed surgically to determine if it is a cancerous bump on the person’s body.

Treatment

Treatment

Treatment is not often necessary for dermatofibromas, as some disappear with time. However, if treatment or removal is necessary or desired, there are a few ways that it can be done. Intra-lesional steroid injections are one option, but it will only reduce the size of the bump. Cryotherapy, cryosurgery, lasers, and removal are all options of treatment, but all of them will leave a scar where the dermatofibroma once was.

*Source:

American Academy of DermatologyThe British Association of Dermatologists

Videos

Dermatofibroma videos