Slow growing
Usually head and neck
About 20% appear on areas less exposed to the sun, such as chest, back, extremities and scalp.
Only where hair follicles exist
Pearly nodule with telangiectatic vessels, rolled border and central ulceration
Basal cell carcinoma
Acute generalized exanthematous pustulosis
Seborrheic keratosis
Allergic reaction
Squamous cell carcinoma
Aphthous stomatitis
Melanoma
Atopic dermatitis