51.0 MB (4.5 MB compressed)
5142 x 3464 pixels
43.4 x 29.2 cm ⏐ 17.1 x 11.5 in (300dpi)
DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
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Psoriasis lesions on the palm of a hand of a 72- year-old man. Psoriasis is a common skin disease involving a large increase in the speed of epidermal (outer skin layer) cell production, which causes scaly pink patches to form that may become infected and itchy. Psoriasis may be caused by certain infections, stress, or be drug- induced. Treatment, depending upon the cause, may involve ointments, phototherapy and drugs.
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