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Mucous membrane pemphigoid is a rare chronic autoimmune subepithelial blistering disease characterized by erosive lesions of the mucous membranes and skin. [3] It is one of the pemphigoid diseases that can result in scarring. [4]
The initial lesion is a small swelling under the skin following minor trauma which breaches the skin. [11] [12] It appears as a painless wet nodule, which may be present for years before ulceration, swelling and weeping from sinuses, followed by bone deformity. [3] [7] The sinuses discharge a grainy liquid of fungal colonies. [11]
Pemphigoid is a group of rare autoimmune blistering diseases of the skin and mucous membranes.As its name indicates, pemphigoid is similar in general appearance to pemphigus, [1] however unlike pemphigus, pemphigoid does not feature acantholysis, a loss of connections between skin cells.
What it looks like: Purplish lesions on the inner arms, legs, wrists, or ankles can signify lichen planus, a skin rash triggered by an overreaction of the immune system.
It often takes on the classical "target lesion" appearance, [7] with a pink-red ring around a pale center. Resolution within 7–10 days is the norm. Resolution within 7–10 days is the norm. Individuals with persistent (chronic) erythema multiforme will often have a lesion form at an injury site, e.g. a minor scratch or abrasion, within a week.
While the presence of lesions is the denominator among patients with PNP, the characteristics of the lesions differ. The five clinical presentations of lesions associated with PNP include: "Pemphigus-like": Flaccid blister (discrete), crusts over the raw exuding skin lesions "Pemphigoid-like": Tense blister(s) on brick red erythema
[6] [7] It is useful in differentiating between the diagnosis of pemphigus vulgaris or mucous membrane pemphigoid (where the sign is present) and bullous pemphigoid (where it is absent). The Nikolsky sign is dislodgement of intact superficial epidermis by a shearing force, indicating a plane of cleavage in the skin epidermal-epidermal junctions ...
The tissue is skin from a patient with Pemphigus vulgaris. Note the intercellular IgG deposits in the epidermis and the early intraepidermal vesicle caused by acantholysis. Pemphigus (/ ˈ p ɛ m f ɪ ɡ ə s / or / p ɛ m ˈ f aɪ ɡ ə s /) is a rare group of blistering autoimmune diseases that affect the skin and mucous membranes. [1]