is associated with pernicious anemia pellagra or nicotinic acid deficiency. The smoothness is cause by the atrophy of the papillae. Riboflavin deficiency may case a magenta-colored atrophic tongue.
The tongue is hypertrophic with pseudo-membranous furrows,erosion,or ulcers,and later becomes atrophic with diminution of its papillea. Cheilitis,angular stomatitis,and glossitis are characteristic features. Severe glossitis causes dysphagia.