Urticaria. Historical medical illustration of cases of urticaria factitia. (Fig.1), also known as dermatographism, and urticaria pigmentosa. (Fig.2). In dermatographism contact with virtually any object can cause the skin to form itchy red weals where contact has occurred. Urticaria pigmentosa is a rare disease caused by excessive numbers of mast cells (a type of white blood cell) in the skin. Red or brown spots are characteristic and weals appear on the skin when irritated. From Atlas of Venereal and Skin Diseases by Prince Albert Morrow, published in 1889. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / US National Library of Medicine |
Bildgröße: | 4834 px × 3632 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |