Safety Trained Supervisor in Construction (STSC) Practice Exam 2025 - Free STSC Practice Questions and Study Guide

The type of skin cancer primarily caused by prolonged sunlight exposure is basal cell carcinoma. This form of skin cancer is specifically linked to the cumulative effect of UV radiation from sun exposure over time. It is the most common type of skin cancer and typically appears as a small, shiny bump or a sore that doesn’t heal, often occurring on sun-exposed areas of the skin, such as the face and neck.

Melanoma, while it can also develop due to UV exposure, is primarily associated with intense, intermittent exposure that leads to sunburn, rather than cumulative exposure. Squamous cell carcinoma is another type of skin cancer linked to sunlight, but it primarily arises from areas of long-term sun damage and is less common than basal cell carcinoma. Carcinoma in situ refers to early-stage cancer where the cells have not invaded deeper tissues and can be linked to a variety of risk factors, not just sun exposure.

Understanding these distinctions is important for prevention and recognizing the risks associated with prolonged sun exposure, which can lead to various types of skin cancers.