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This is a shortened version of the twelfth chapter of the ICD-9: Diseases of the Skin and Subcutaneous Tissue. It covers ICD codes 680 to 709. The full chapter can be found on pages 379 to 393 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1.
Angioedema, excruciatingly itchy recurrent wheals, or both can be signs of chronic spontaneous urticaria. [5] Between 40 and 50 percent of CSU patients experience angioedema. [6] However, angioedema is the main symptom reported by about 10% of patients. [7] Usually, urticarial lesions or hives are elevated, erythematous plaques with a defined ...
Dermatographic urticaria is sometimes called "skin writing", as it is possible to mark deliberate patterns onto the skin. The condition manifests as an allergic-like reaction, causing a warm red wheal to appear on the skin. As it is often the result of scratches, involving contact with other materials, it can be confused with an allergic ...
The dermis is the layer of skin between the epidermis and subcutaneous tissue, and comprises two sections, the papillary dermis and the reticular dermis. [10] The superficial papillary dermis interdigitates with the overlying rete ridges of the epidermis, between which the two layers interact through the basement membrane zone. [ 10 ]
Hives, also known as urticaria, is a kind of skin rash with red and/or flesh-colored, raised, itchy bumps. [1] Hives may burn or sting. [ 2 ] The patches of rash may appear on different body parts, [ 2 ] with variable duration from minutes to days, and do not leave any long-lasting skin change. [ 2 ]
Urticarial vasculitis (also known as "chronic urticaria as a manifestation of venulitis", "hypocomplementemic urticarial vasculitis syndrome", "hypocomplementemic vasculitis" and "unusual lupus-like syndrome") [1] is a skin condition characterized by fixed urticarial lesions that appear histologically as a vasculitis.
However, the understanding of urticaria as an autoimmune condition is a relatively recent development in medical history. [14] The term autoimmune urticaria refers to a subset of chronic spontaneous urticaria (CSU) cases where the immune system appears to play a significant role. This understanding began to evolve in the mid to late 20th ...
Acute urticaria (short-term): can develop suddenly and will last less than six weeks. [6] About one in six people will have acute hives at one point in their life. [6] Chronic urticaria (long-term): can develop suddenly and will persist more than six weeks. [6] This type of urticaria is uncommon [6] and occurs in only 0.1% of the population.