Precancerous Dermatosis and Epithelioma in Situ

Solar cheilosis: An ominous precursor

“…All predominate in older individuals with a light complexion. [8][9][10][11]14,19,20,[48][49][50][51][52][53][54][55][56][57] AK has been studied in considerably more detail than SC, although the risk of metastatic spread of tumor is far greater when SCC develops on the lips. Although the risk factors are similar in both SC and AK, including age, geographic latitude of residence, leisurely or occupational habits, light skin complexion, genetic predisposition, and immunosuppression, unique aspects pertinent to the lips will be emphasized.…”

Dyskeratoma and Epithelioma (Carcinoma) Dyskeratoticum Segregans

“…etc. Montgomery (1939) has mentioned transitory states between benign dyskeratosis of Daricr's type and malignant one of Bowen's type to occur in senile keratosis.…”

Health hazard evaluation report: HETA-82-185-1353, Markland Lock & Dam, Markland, Kentucky.

“…Other factors include exposure to arsenic compounds (5), organic hydrocarbons such as pitch and tar (6,7), chewing betel nut and tobacco, chronic ulcers, and radiation or thermal injury. A condition that, while not in itself malig nant, may progress to squamous cell carcinoma is actinic keratosis (8,9). This occurs at skin surfaces previously damaged by the sun.…”