A Herald Patch Almost Encircling the Trunk-Extreme Pityriasis Rosea Gigantea in a Young Child.

An 18-month-old girl presented with pityriasis rosea gigantea. The herald patch encircled almost the entire trunk. The distribution of lesions on the trunk and proximal aspects of the limbs, the collarette scaling, the orientation of some lesions along the skin crease lines, and biopsy findings substantiated the diagnosis.