Occurrence of primary multiple cancer in patients with cancer of the lip.
D000328:Adult; D000367:Age Factors; D000368:Aged; D005387:Finland; D006801:Humans; D008048:Lip Neoplasms; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000453:epidemiology*; D012878:Skin Neoplasms / Q000453:epidemiology