nutritional disorders
Riboflavin Deficiency
Key Points
Riboflavindeficiency causes various nonspecific skin and mucosal lesions, including maceration of mucosa at the angles of the mouth (angular stomatitis) and surfaces of the lips (cheilosis). Suspectriboflavindeficiency in patients with characteristic symptoms and other B vitamin deficiencies; confirm it with a therapeutic trial ofriboflavinsupplements or measurement of urinary excretion ofriboflavin. Treat with supplement ofriboflavinand other water-soluble vitamins. 