Author(s): Pindborg JJ, Mehta FS, Gupta PC, Daftary DK, Smith CJ, Pindborg JJ, Mehta FS, Gupta PC, Daftary DK, Smith CJ
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Abstract In the district of Srikakulam in Andhra Pradesh in South India the habit of reverse smoking is widespread. In a house to house survey of oral cancer and precancerous conditions, comprising 10,169 villagers, 43·8\% were reverse smokers; the female: male ratio being 1·7: 1. Ten previously undiagnosed cases of oral cancer, 9 located to palate, were found. The prevalences for leukoplakia, preleukoplakia and leukokeratosis nicotina palati were 4·9\%, 2·9\% and 9·5\%. Of 497 leukoplakias, 422 were located to the palate and 413 of these patients had the habit of reverse smoking. Histologically, 80\% of 381 palatal biopsies had a hyperorthokeratosis. Epithelial atypia was found in 15·3\% of leukoplakias, in 3·6\% of the preleukoplakias, and in 9·1\% of leukokeratosis nicotina palati. Various explanations for the habit of reverse smoking are suggested and discussed. In addition to reverse smoking, other tobacco habits were also recorded; all habits and oral lesions were compared and have been discussed according to their apparent interrelationships and distribution by sex and age.
This article was published in Br J Cancer
and referenced in Journal of Medical Diagnostic Methods