What Is a Dermatofibroma?
Dermatofibroma is a benign tumor in the dermis caused by focal hyperplasia of fibroblasts or histiocytes. The disease can occur at any age, more common in young and middle-aged, and more women than men. Can occur naturally or after trauma. Tan or pale red intradermal pimples or nodules are clinical features of the disease. Lesions grow slowly, persist for a long time, and rarely resolve on their own.
Basic Information
- English name
- dermatofibroma
- Visiting department
- dermatology
- Multiple groups
- Young women
- Common locations
- Limb extension
- Common symptoms
- The nodules are located in the dermis, without capsules, and the boundary is unclear. The nodules are clearly staggered with the surrounding normal tissues, and the lower boundary is clear.
Causes of cutaneous fibroma
- The true cause of the disease is unknown. The onset of this disease may be reactive and is associated with localized skin damage, such as insect bites or blunt injury. Some people also think that there is a certain relationship with the virus infection. However, clonal analysis suggests that the disease is tumorous.
Skin fibroma clinical manifestations
- More common in the extremities of the extremities, but also in other parts. The lesions appear as round or oval papules or nodules, about 1 cm in diameter and usually no more than 2 cm, even 2 cm or larger. Raised, hard, base pushed, but connected to the epidermis. The skin on the surface is smooth or rough, with different shades. It can be normal skin color, or tan, dark brown, or light red. More common in young and middle-aged, rare in children, and more common in women. Skin lesions often persist, and a few can subside on their own after a few years. Usually without symptoms and occasionally mild pain. Usually single shot, even or multiple shots.
Skin fibroma test
- Histopathological examination of the skin lesions revealed that the nodules were located in the dermis, without capsules, and had an unclear boundary, which was clearly intertwined with the surrounding normal tissues. The lower boundary was clear. There was often a "boundary zone" between the upper boundary and the epidermis, but the tumor tissue Sometimes connected to the epidermis. The diseased tissue is composed of bundled fibroblasts, histiocytes, and mature or naive collagen fiber tissues, intertwined with each other; the epidermis above the lesion is significantly proliferated, the spinous layer is hypertrophic, and the dermal process is prolonged. Occasionally there are mitotic figures. According to the proportion of tumor cell components and collagen fibers, it is divided into two tissue types, namely, fibrous and cellular.
Skin fibroma diagnosis
- Can be diagnosed based on clinical manifestations and histopathological examination.
- 1. Local history of minor trauma.
- 2. The clinical manifestations are intradermal pimples or nodules yellowish brown or pale red, etc., and do not adhere to deep tissues.
- 3. Histopathological examination accorded with the pathological changes of cutaneous fibroids.
Dermatofibroma Treatment
- Generally no treatment is required, and a few lesions can resolve within a few years. If there is pain in a single lesion causing pain to the patient, surgical resection can be performed. Intradermal injection of corticosteroids has a certain effect.