PMC7739077_01
(a) Right palm with numerous faint tan-brown hyperpigmented macules ranging from 2 to 7 mm on central palm and scattered faint tan-brown hyperpigmented macules between finger spaces bilaterally. (b) Evidence of improvement in hyperpigmentation on palm after vitamin B12 supplementation. (c) Palate and tongue with faint tan-brown hyperpigmented macules. (d) Evidence of improvement in hyperpigmentation on tongue and palate 6 months later.
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PMC7739077_01_10.1177_2050313X20979207-fig1.jpg
fig1-2050313X20979207
Dermatology for evaluation of asymptomatic hyperpigmentation of the palms, soles, hard palate, and tongue for 6 months (Figure 1(a) and (c)). Dermoscopy was not performed on the mucocutaneous lesions. At that time, her B12 level increased to 844 pg/mL, and there was significant improvement in hyperpigmentation (Figure 1(b) and (d)).