Facial Erythema and Onychoschizia—Quiz Case

Cutaneous manifestations of nutritional deficiency

“…Symptoms and findings can remain very mild as highlighted in a review of asymptomatic family members of affected patients [25 ] and by a recent report of a 7-year-old otherwise healthy boy presenting with only facial erythema and onychoschizia (distal splitting of the nail) [26].…”