Median rhomboid glossitis

Median rhomboid glossitis (MRG, also known as central papillary atrophy, or glossal central papillary atrophy. ) is a condition characterized by an area of redness and loss of lingual papillae, situated on the dorsum of the tongue in the midline immediately in front of the circumvallate papillae. Median rhomboid glossitis is thought to be created by a chronic fungal infection, and usually is a type of oral candidiasis.