PR is a papulosquamous dermatosis. Classically, the condition presents with a single large lesion (herald patch). Within a few days to a few weeks, multiple additional smaller lesions appear along the ...

This patient had pityriasis rosea, an acute inflammatory dermatosis of unknown etiology. Viruses, particularly human herpesvirus 6 and 7, have been suggested as the causative pathogen, but study ...

Classically, pityriasis rosea begins as an erythematous, scaly patch on the trunk, known as a herald patch. This large lesion is commonly 2–10 cm in diameter, ovoid, erythematous and slightly raised, ...