A<unk>  (also known as "pitch keratosis", "tar keratosis", and "tar wart") is a precancerous keratotic skin lesion that occurs in people who have been occupationally exposed to polycyclic aromatic<unk> s.
Hydrocarbon keratosis
Arsenical keratosis
Reactional keratosis
PUVA keratosis
Actinic keratosis
Smokeless tobacco keratosis
Seborrheic keratosis
Dermal cylindroma