The lesions are erythema multiforme and urticarial. The oral mucosal lesions are red, raw, and extend to the outer part of the lips. What is the critical thinking and differential diagnosis that ...

Erythema multiforme is often triggered by herpes simplex virus in children. Unilateral laterothoracic exanthem is a distinct exanthem, which preferentially affects one side of the body ...

Inspection disclosed accompanying residual herpes simplex lesions on the upper lip, and we suspected erythema multiforme. Histological examination showed superficial and deep lymphocytic ...