Sinonimi: Benign histiocytoma, fibrous histiocytoma
The real reason for formation of these skin lesions is unknown. Microtrauma of the skin can be cited as one of the possible causes.
They are usually brownish lumps in the skin, sizing from a few mm to a centimeter with a whitish center. In most cases they are painless, and in a small number of cases patients cite pain or itching in the region.The size can rarely get larger, but the intensity of the color may change over periods of time.
Diagnosis is easily made by clinical examination ( by eye), and dermoscopy. Biopsy is rarely needed.
If it doesn’t cause any nuisance and doesn’t present an esthetical issue, it can be left untreated.
Still, if it grows, it’s important to preventively remove it, and the method of choice is an excision.
Risk factors and prevention
Repeated microtrauma to the skin is considered a risk factor (punctures, depilation, mosquito bytes…)
Risk group is considered to be women after the age of 40, because of the decrease in estrogen hormones.
Frequently asked questions
No, it’s not always necessary to remove dermatofibromas because they are benign skin lesions.
But, if it grows or changes, removing it for preventive reasons is advised.
Can it reappear after removal?
No, but a new one can form near the site of the old one or on other regions.
Which are the most commonly affected regions?
Usually it appears in women, on the legs.