Psoriasis on the hand. Artwork from Robert Willan's 1808 medical textbook, On Cutaneous Diseases, showing what he calls psoriasis palmaria, or psorasi

---

Psoriasis on the hand. Artwork from Robert Willan's 1808 medical textbook, On Cutaneous Diseases, showing what he calls psoriasis palmaria, or psorasis affecting the palm of the hand. Psoriasis is a condition caused by skin cells replicting more rapidly than normal, leading to inflamed patches, or plaques. Willan (1757- 1812) founded the science of dermatology.

---

Size: 2892px × 4200px
Photo credit: © MEHAU KULYK/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1800s, 1808, 19th, artwork, body, century, condition, dermatological, dermatology, disease, disorder, drawing, hand, healthcare, historical, history, human, illustration, image, lesion, lesions, medical, medicine, palmaria, plaque, plaques, psoriasis, robert, scaly, skin, willan