Dermatofibroma | |
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Other names | Dermal dendrocytoma,[1] Dermatofibroma,[2] Fibrous dermatofibroma,[2] Fibrous histiocytoma,[2] Fibroma simplex,[1] Nodular subepidermal fibrosis,[1] and Sclerosing hemangioma[1]) |
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Histopathology of dermatofibroma, with basilar hyperpigmentation of the overlying epidermis (top right), and spindled fibroblasts with collagen entrapment. HE stain. | |
Specialty | Oncology ![]() |
A dermatofibroma, or benign fibrous histiocytomas, is a benign nodule in the skin, typically on the legs, elbows or chest of an adult.[3] It is usually painless.[3]
It usually ranges from 0.2cm to 2cm in size but larger examples have been reported.[3] It typically results from mild trauma such as an insect bite.[3] Risk factors for developing multiple dermatofibromas include lupus, HIV, blood cancer and some medicines that weaken immunity.[3]
It is usually diagnosed by its appearance, but a biopsy may be required.[3] Other bumps such as granular cell tumor, melanoma, clear cell acanthoma and dermatofibrosis lenticularis disseminata may look similar.[3] Usually no treatment is needed.[3] It can remain unchanged for years but can resolve spontaneously.[3]
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