Melanokeratosis from arsenic contaminated tubewell water.
D020261:Arsenic Poisoning; D006801:Humans; D007194:India; D007642:Keratosis / Q000139:chemically induced* / Q000473:pathology; D008548:Melanosis / Q000139:chemically induced* / Q000473:pathology; D014877:Water Pollution, Chemical / Q000009:adverse effects*; D014881:Water Supply