Fig. 2From: Diagnostic value of oral “beefy red” patch combined with fingertip blood mean corpuscular volume in vitamin B12 deficiencyDifferent oral manifestations of VB12 deficiency. a, b Extensive linear or band-like “beefy red” patches on the lingual dorsum and lingual marginal in VB12 deficiency. c Localized “beefy red” patches on the underside of the tongue. d Ulcer on the ventral region of the tongueBack to article page