Chronic sun exposure is an important contributing factor in the development of this type of skin cancer. Some people who have had chronic arsenical exposure in the past may also develop these cancers later in life.

The growth can increase in size giving rise to a large lump which may sometimes break down to form an ulcer. If untreated, the cancer may spread to the surrounding lymph nodes. Squamous cell carcinoma usually appears in elderly patients.

A pre-malignant stage (early stage) of this is Bowen’s Disease. It commonly presents as a scaly plaque which does not respond to treatment.

One should avoid the sun and use a sunscreen.

Destruction with liquid nitrogen application; laser ablation and chemical peel is effective in removing the lesion.