Can viral exanthems be on one half of the body?


Unilateral laterothoracic exanthem demonstrating a lacy appearance.
Fig. 24.5 Unilateral laterothoracic exanthem demonstrating a lacy appearance.
Yes. The unilateral laterothoracic exanthem, seen predominantly in children, can be unilateral at initial presentation. Some cases spread to the contralateral side but often remain accentuated on the side of initial presentation. Although it is believed to be a viral exanthem, a viral cause has not been proven (Fig. 24-5).

Drago F, Rampini E, Rebora A: Atypical exanthems: morphology and laboratory investigations may lead to aetiological diagnosis in about 70% of cases, Br J Dermatol 147:255–260, 2004.