| ICD9 = | ICDO = | OMIM = | DiseasesDB = 9730 | MedlinePlus = 000342 | eMedicineSubj = ped | eMedicineTopic = 1755 | MeshName = Pellagra | MeshNumber = C18.654.521.500.133.699.529 | }} Pellagra's a vitamin deficiency disease caused by lack of niacin (vitamin B3). It can be caused by decreased intake of niacin, tryptophan, or perhaps leucine. It may also result from alterations in protein metabolism in disorders such as carcinoid syndrome. History The traditional food preparation method of corn… (More on Pellagra)