Cutaneous lupus erythematosus (overview)L93.-

In 1845, F.v. Hebra, according to M. Kaposi (see Fig.), for the first time precisely described the clinical picture of cutaneous lupus erythematosus under the name "Seborrhoea congestiva", which was later (1851), then named by M. Cazenave, in the "Annales des maladies de la peau" as "Lupus erythematosus". In earlier publications by Laurent Théodore Biett, this clinical picture was also referred to under the designation "datre rongeante qui détruit en surface", to which M. Cazenave and H.E. Schedel refer in their "Abrégé pratique des mal. des la peau" from 1828. Thus, Laurent Théodore Biett (1781-1840; active at the Hospital St. Louis, there successor of Jean Louis Marc Alibert) probably deserves the honor of the first description, whereby (as M. Kaposi writes) "the clinical picture and the naming of the disease in a characteristic way was first established by Hebra, extended and named by Cazenave, according to the later experiences".

Cutaneous lupus erythematosus (CL) is an acute, subacute, or chronic inflammatory autoimmune disease dominated by skin symptoms, with a wide spectrum of clinical manifestations and a variable course. Different subtypes can be distinguished depending on the acuity and depth of the infiltrate cells. Important: Transitional forms can be observed as well as the synchronous occurrence of several subtypes in one individual.

A generally valid classification of cutaneous lupus erythematosus (CLE) goes back to Gilliam and Sontheimer (1981), who distinguished between specific and non-specific lesions of cutaneous LE. In the course of the disease, a tripartite division can be made according to acuities. Accordingly, one distinguishes:

• Acute
• Subacute
• Chronic

The following clearly defined clinical syndromes are classified in these categories. The numbers in parentheses refer to their frequencies within a collective of CL patients (Biazar C et al. 2013):

• Acute cutaneous lupus erythematosus (ACLE - 30%):
• Subacute cutaneous lupus erythematosus (SCLE - 24%).
• Chronic cutaneous lupus erythematosus (CDLE):
  • chronic discoid lupus erythematosus (CDLE - 40%)
  • Lupus erythematosus tumidus
  • Lupus erythematosus profundus (lupus erythematosus panniculitis).
• Rare special forms:
  • Chilblain's lupus
  • Rowell's syndrome (to be defined as erythema exsudativum multiforme-like ACLE - see below. Lupus erythematosus acute-cutaneous)
  • Lupus erythematosus verrucosus
  • Neonatal lupus erythematosus

Worldwide incidence; the incidence of cutaneous lupus erythematosus is approximately 10x more common than systemic lupus erythematosus (SLE). The incidence of systemic lupus erythematosus is reported to be 5-10/100,000/year.

It is assumed that in cutaneous LE (CLE) epidermal keratinocytes are the target cell of the "immunological injury". It is postulated that an autoimmunological reaction is triggered by increased apoptosis induction (keratinocytes of LE patients produce increased IL-18 receptors on their surface after stimulation with TNF-α or IFN-γ; they become more apoptotic after IL-18 exposure. At the same time, the production of IL-12 is reduced; IL-12 protects keratinocytes from UV-induced apoptosis).

Mainly occurring in middle-aged adults (25 - 60 years, mean: 43+/- 16 years), more frequent in women (w:m=3-6:1)

Rarely antinuclear factors or cardiolipin antibodies, leukopenia(autoantibodies).

Clinical forms of integumentary lupus erythematosus:

• Lupus erythematosus discoides
• Lupus erythematosus chronicus integumentalis cum exacerbatione acuta
• Lupus erythematosus chronicus superficiales disseminatus
• Lupus erythematosus profundus
• Lupus erythematosus hypertrophicus et profundus
• Lupus erythematosus verrucosus
• Lupus erythematosus tumidus
• Chilblain's lupus

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