ⓘ Dermatofibroma

                                     

ⓘ Fibrous histiocytoma

Dermatofibromas are hard solitary slow-growing papules rounded bumps that may appear in a variety of colours, usually brownish to tan, they are often elevated or pedunculated. A dermatofibroma is associated with the dimple sign, by applying lateral pressure, there is a central depression of the dermatofibroma. Although typical dermatofibromas cause little or no discomfort, itching and tenderness can occur. Dermatofibromas can be found anywhere on the body, but most often they are found on the legs and arms. They occur most often in women, the male to female ratio is about 1:4. The age group in which they most commonly occur is 20 to 45 years.

Some doctors and researchers believe, dermatofibroma, form as a reaction to previous injuries such as insect bites or thorn pricks. They are composed of disordered collagen laid down fibroblasts. Dermatofibroma are classified as benign lesions, that is, they are completely harmless, although they can be confused with many subcutaneous tumors. Deep penetrating dermatofibroma may be difficult to distinguish, even histologically, from rare malignant tumors, as fibrohistocytic wybuchowa dermatofibrosarcoma.

Dermatofibroma, as a rule, have a positive button-hole sign, or Central ruffle in the center.

                                     
  • lateral pressure on the skin produces a depression. It is associated with dermatofibroma Aradi AJ, Wong J, Walsh M March 1988 The dimple sign of a ruptured
  • melanocytic lesion affecting the epidermis and dermis Epithelioid hemangioma Epithelioid cell histiocytoma, a skin condition similar to dermatofibroma
  • histiocytoma is a rare skin condition that is considered to be a variant of a dermatofibroma Pleomorphic lipoma List of cutaneous conditions Rapini, Ronald P.
  • durum consists of many fibres and few cells, e.g. in skin it is called dermatofibroma fibroma simplex or nodulus cutaneous A special form is the keloid
  • may persist for years. The clinical differential diagnosis includes: dermatofibroma inflamed seborrheic keratosis, pyogenic granuloma, basal cell carcinoma
  • xanthoma, and xanthelasma and xanthogranulomas.They are also found in dermatofibroma Touton giant cells are named for Karl Touton, a German botanist and
  • other structures. Elastic fibers are absent from scarring, keloids and dermatofibromas and they are decreased greatly, or are absent in anetodermas. Elastic
  • behind the eponym: Hans Biberstein and follicular hyperplasia overlying dermatofibroma The American Journal of Dermatopathology. 31 7 710 714. doi: 10
  • Dermatocardioskeletal syndrome Boronne type Dermatographic urticaria Dermatofibroma Dermatoleukodystrophy Dermatomyositis Dermatoosteolysis Kirghizian type
  • trichilemmoma Desmoplastic tumor of the follicular infundibulum Sclerotic dermatofibroma Desmoplastic fibroblastoma Desmoplastic cellular neurothekeoma Sclerosing
  • including blue rubber bleb nevus, leiomyoma, eccrine spiradenoma, neuroma, dermatofibroma angiolipoma, neurilemmoma, endometrioma, glomus tumor and granular