Abstract

1) In patients with chronic arsenic poisoning at Toroku, the incidence of pulmonary carcinoma and that of urinary tract carcinoma were significantly higher than in the general public.
2) Among carcinomas appearing on the skin, Bowen's disease (covered areas) and solar keratosis were comparatively higher in incidence.
3) The above-stated carcinomas should especially be checked in patients with chronic arsenic poisoning.
4) In cases when Bowen's disease appears preceding internal carcinomas, the period of precedence was longer in woman (13years on the average) than in man (within 5 years or 3 years on the average).