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Hydrocarbon keratosis
Other namesPitch keratosis, tar keratosis, and tar wart.
Tar wart
Specialty Dermatology

A hydrocarbon keratosis, 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 hydrocarbons. [1]: 728 

References

  1. ^ Freedberg, et al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. ISBN  0-07-138076-0.