May 10, 2021 — As US population demographics change, clinicians need to be familiar with variations in the prevalence and clinical presentation of .... Pellagra is a disease caused by a lack of the vitamin niacin (vitamin B3). Symptoms include inflamed skin, diarrhea, dementia, and sores in the mouth. ... This child has the skin rash associated with pellagra. Man with pellagra with typical skin .... Thyroid gland produces too much thyroid hormone (overactive thyroid, Graves diseas