Psoriasis is First Clinically Described by Robert Willan

Plenck doesn’t compared the Psoriasis from other skin diseases discovered until Robert Willan (1757-1812), an English dermatologist together with Thomas Bateman recognized this disease as an independent. They divided it into two categories: (1) Leprosa Graecorum, as the condition when the skin had scales; and (2) Psora Leprosa, as the condition when it became eruptive.

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