Comment on “dermatitis herpetiformis in an african woman”, the importance of direct immunofluorescence assay

This letter to the editor comments on the previously published case report “Dermatitis herpetiformis in an African woman” and highlights the importance of direct immunofluorescence (DIF) as the gold standard for diagnosis. The authors argue that the clinical and histopathological findings described in the original case are more consistent with linear IgA bullous dermatosis (LABD) than dermatitis herpetiformis (DH), emphasizing key clinical clues such as tense blisters in a “pearl necklace” arrangement and post-inflammatory dyschromia. They also discuss the role of serologic testing (IgA anti-tTG antibodies) and diagnostic algorithms, underlining that accurate early differentiation is essential because DH requires a lifelong gluten-free diet, unlike LABD.