Dermatology Book

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Dermatofibroma

Aka: Dermatofibroma, Solitary histiocytoma, Sclerosing Hemangioma, Nodulus Cutaneous, Fitzpatrick's Sign
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  1. Causes
    1. Idiopathic benign skin tumor
    2. Fibrous reaction to local irritation
      1. Local trauma
      2. Insect Bite
      3. Viral infection
      4. Folliculitis
    3. Underlying condition (>15 Dermatofibromas)
      1. Immunocompromised patient
      2. Autoimmune condition
  2. Signs
    1. Characteristics
      1. Small firm Papule, Plaque or Nodule (<1cm)
      2. Completely symmetric and regular
      3. Tan or light brown surface (may be red or yellow)
        1. Color gradually fades into normal skin color
      4. Fitzpatrick's Sign
        1. Skin dimples downward with lateral compression
    2. Distribution
      1. Most common: Anterior thighs and Legs
      2. Moderately common: Arms and Trunk
      3. Uncommon: Head, Palms, and Soles
  3. Differential Diagnosis
    1. Primary Malignant Melanoma
    2. Scar
    3. Blue Nevus
    4. Pilar Cyst
    5. Metastatic Carcinoma
    6. Kaposi's Sarcoma
  4. Management
    1. Excision Indications
      1. Repeated trauma
      2. Unacceptable cosmetic appearance
      3. Uncertain diagnosis
    2. Techniques
      1. Eliptical excision or Punch Biopsy
        1. Risk of scarring
      2. Other methods (incomplete removal)
        1. Shave Biopsy
        2. Cryotherapy
  5. References
    1. Fitzpatrick (1999) Color Atlas Dermatology

Cutaneous Fibrous Histiocytoma (C0002991)

Definition (MSH) A slowly growing benign skin nodule consisting of poorly demarcated cellular fibrous tissue enclosing collapsed CAPILLARIES with scattered HEMOSIDERIN-pigmented and lipid MACROPHAGES. They are common, usually about 1 cm in diameter and occur in the DERMIS. (From Stedman, 25th ed; DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, p1356)
Definition (NCI) A solitary, slowly growing nodular mass, most often affecting the extremities. It is composed of fibrous and histiocytic cells which infiltrate the dermis and occasionally the underlying subcutaneous tissue. Usually local excision is curative. Recurrences are reported only in a small minority of cases.
Concepts Neoplastic Process (T191)
MSH D018219
ICD10 M8832/0
SnomedCT 427186000, 72079004, 403997008, 448015002, 302843004, 254750001, 134302009, 403999006, 189051001, 254753004
English DERMATOFIBROMA, Dermatofibroma, NOS, Dermatofibroma NOS, Dermatofibroma (disorder), Dermatofibroma, no ICD-O subtype, dermatofibromas, sclerosing hemangioma, cutaneous histiocytoma, histiocytomas, pleomorphic fibroma, histiocytoma, Pleomorphic fibroma, Cutaneous histiocytoma (disorder), Pleomorphic fibroma (disorder), Subepidermal nodular fibrosis, Dermatofibroma lenticulare, Fibrous histiocytoma of skin, Fibrous xanthoma of skin, Sclerosing angioma, [M]Dermatofibroma NOS, Cutaneous histiocytoma, Fibrous histiocytoma of skin (disorder), Sclerosing angioma (morphologic abnormality), Sclerosing angioma of skin (disorder), Sclerosing angioma of skin, Benign fibrous histiocytoma of skin, Fibrous xanthoma of skin (disorder), Dermatofibroma (morphologic abnormality), Dermatofibroma, no ICD-O subtype (morphologic abnormality), Fibrous Histiocytoma of Skin, Fibrous Histiocytoma of the Skin, Benign Cutaneous Fibrous Histiocytoma, Benign Fibrous Cutaneous Histiocytoma, Benign Fibrous Histiocytoma of Skin, Benign Fibrous Histiocytoma of the Skin, Benign Skin Fibrous Histiocytoma, Cutaneous Fibrous Histiocytoma, Dermatofibroma, Angioma, Sclerosing, Angiomas, Sclerosing, Sclerosing Angioma, Sclerosing Angiomas, Dermatofibromas, Sclerosing Hemangioma, Cutaneous Histiocytomas, Cutaneous Histiocytoma, Hemangioma, Sclerosing, Hemangiomas, Sclerosing, Histiocytoma, Cutaneous, Histiocytomas, Cutaneous, Sclerosing Hemangiomas, dermatofibroma
Spanish dermatofibroma, no clasificado como subtipo en CIE-O, dermatofibroma (anomalía morfológica), dermatofibroma (trastorno), Dermatofibroma, angioma esclerosante (anomalía morfológica), angioma esclerosante de la piel (trastorno), angioma esclerosante de la piel, angioma esclerosante, dermatofibroma lenticular, dermatofibroma, histiocitoma cutáneo (trastorno), histiocitoma cutáneo, histiocitoma fibroso cutáneo (trastorno), histiocitoma fibroso cutáneo, xantoma fibroso cutáneo (trastorno), xantoma fibroso cutáneo, dermatofibroma, no clasificado como subtipo en CIE-O (anomalía morfológica), Hemangioma Esclerosante, Histiocitoma Cutaneo, Histiocitoma Cutáneo
Dutch dermatofibroom
Japanese 皮膚線維腫, ﾋﾌｾﾝｲｼｭ
Czech dermatofibrom, angiom sklerózující, histiocytom kůže, Dermatofibrom
Portuguese Dermatofibroma, Hemangioma Esclerosante, Histiocitoma Cutâneo
French Dermatofibrome, Angiome sclérosant
German Dermatofibrom, Angiom, sklerosierendes, Histiozytom, kutanes, Hämangiom, sklerosierendes
Italian Dermatofibroma
Hungarian Dermatofibroma
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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