Symmetric acral annular erythema: a variant of erythema annulare centrifugum, necrolytic acral erythema or a distinct clinical entity?

Erythemas occur due to the dilation of blood vessels, especially those in the papillary and reticular dermis, clinically resulting in the change of the skin colour [1]. This group of dermatoses is very heterogenous, encompassing figurate erythemas such as erythema annulare centrifugum (EAC) or necrolytic erythemas, including necrolytic acral erythema (NAE). Due to the abundance of morphological variants and eliciting factors, the classification and diagnosis of erythematous lesions may be challenging, especially in patients suffering from other diseases or taking many pharmaceuticals