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  2. Seborrheic keratosis - Wikipedia

    en.wikipedia.org/wiki/Seborrheic_keratosis

    A seborrheic keratosis is a non-cancerous skin tumour that originates from cells, namely keratinocytes, in the outer layer of the skin called the epidermis. Like liver spots , seborrheic keratoses are seen more often as people age.

  3. Keratoacanthoma - Wikipedia

    en.wikipedia.org/wiki/Keratoacanthoma

    Keratoacanthoma is commonly found on sun-exposed skin, often face, forearms and hands. [2] [3] It is rarely found at a mucocutaneous junction or on mucous membranes. [2] Keratoacanthoma may be difficult to distinguish visually from a skin cancer. [4] Under the microscope, keratoacanthoma very closely resembles squamous cell carcinoma. In order ...

  4. Actinic cheilitis - Wikipedia

    en.wikipedia.org/wiki/Actinic_cheilitis

    The lip may become scaly and indurated as AC progresses. When palpated, the lip may have a texture similar to rubbing the gloved finger along sandpaper. [7] AC may occur with skin lesions of actinic keratosis or skin cancer elsewhere, particularly on the head and neck [6] since these are the most sun exposed

  5. Leser–Trélat sign - Wikipedia

    en.wikipedia.org/wiki/Leser–Trélat_sign

    Many seborrheic keratoses on the back of a person with Leser–Trélat sign due to colon cancer. The Leser–Trélat sign is the explosive onset of multiple seborrheic keratoses [1] (many pigmented skin lesions), [2] [3] often with an inflammatory base. This can be a sign of internal malignancy as part of a paraneoplastic syndrome. In addition ...

  6. List of skin conditions - Wikipedia

    en.wikipedia.org/wiki/List_of_skin_conditions

    Clear cell squamous cell carcinoma (clear cell carcinoma of the skin) Chronic scar keratosis (chronic cicatrix keratosis) Clonal seborrheic keratosis; Common seborrheic keratosis (basal cell papilloma, solid seborrheic keratosis) Cowden syndrome (Cowden's disease, multiple hamartoma syndrome) Cutaneous ciliated cyst; Cutaneous columnar cyst

  7. List of cutaneous conditions associated with increased risk ...

    en.wikipedia.org/wiki/List_of_cutaneous...

    Conditions of or affecting the human integumentary system associated with increased risk of nonmelanoma skin cancer Condition Squamous-cell carcinoma Basal-cell carcinoma; Xeroderma pigmentosum + + Oculocutaneous albinism + + Epidermodysplasia verruciformis + Recessive dystrophic epidermolysis bullosa + Ferguson–Smith syndrome + Muir–Torre ...

  8. Lentigo maligna - Wikipedia

    en.wikipedia.org/wiki/Lentigo_maligna

    First dilemma in diagnosis is recognition. As lentigo malignas often present on severely sun-damaged skin, it is frequently found amongst numerous pigmented lesions – thin seborrheic keratoses, lentigo senilis, lentigines. It is difficult to distinguish these lesions with the naked eye alone, and even with some difficulty using dermatoscopy ...

  9. Cutaneous squamous-cell carcinoma - Wikipedia

    en.wikipedia.org/wiki/Cutaneous_squamous-cell...

    SCC of the skin begins as a small nodule and as it enlarges the center becomes necrotic and sloughs and the nodule turns into an ulcer, and generally are developed from an actinic keratosis. Once keratinocytes begin to grow uncontrollably, they have the potential to become cancerous and produce cutaneous squamous-cell carcinoma.