26 - Tumors Skin tumors, such as this ulcerating squamous cell carcinoma most frequently arise after years of occupational exposure. Malignant tumors may represent to occupational carcinogens such as coal tar and physical agents such as sunlight.
Skin cancer is the commonest form of cancer.
The role played by occupational factors is frequently difficult to determine. There are four direct causes of occupational dermatoses. Many new chemicals capable of injuring the skin are introduced each year. Organic and inorganic chemicals encountered in industry, including tose in natural products, constitute a never-ending list of potential hazards. These chemicals may act as primary irritants or as allergic sensitizers.