Pityriasis rosea was first described by Gibert in 1860, but it was not until 1900 that its recognition as a distinct clinical entity became established. Since then, varying clinical features have been added so that at present the clinical criteria are so elastic that a diagnosis is much more often and more readily reached.
Widal1 described a case of pityriasis rosea which lasted six months, Hallopeau reported a case in which the herald patch preceded the general eruption by two months. In the case described by Allen2 the herald patch was gigantic; it occupied one-half the chest wall.
REPORT OF CASE
E. A., aged 63, born in Russia, was first seen on Feb. 10, 1933. Over the right scapular region he presented a lesion which had been present for four months. The lesion was sharply defined and was about the size of a small palm. It was composed
GREENHOUSE C, CORNELL VAH. PITYRIASIS ROSEA: REPORT OF CASE SHOWING A GIGANTIC HERALD PLAQUE WITH UNUSUAL MANIFESTATIONS. Arch Derm Syphilol. 1933;28(6):823–824. doi:10.1001/archderm.1933.01460060060010
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