Leukoplakia of oral mucous membrane, tongue and anal region; nine-year ingestion of vitamin B complex as a possible etiologic factor.
D006801:Humans; D007971:Leukoplakia / Q000209:etiology*; D009059:Mouth Diseases; D009061:Mouth Mucosa; D009525:Niacin / Q000633:toxicity*; D014059:Tongue; D014803:Vitamin B Complex
D014803:Vitamin B Complex; D009525:Niacin
LEUKOPLAKIA/etiology and pathogenesis; MOUTH/diseases; NICOTINIC ACID/toxicity