Past Medical History

His past medical history is negative for AIDS, diabetes, and alcohol use, but it is positive for cigarette smoking, which he began at age 17, smoking 4-5 cigarettes per day for almost three years.  He quit smoking as these lesions began to appear, which was 1 year prior to the incisional biopsy performed by an oral surgeon in September 2006.  His family history is positive for similar lesions in his mother’s mouth and in a cousin from the mother’s side of the family.