autoimmune blistering conditions Flashcards
describe bullous pemphigoid (what, target, age)
- acquired autoimmune blistering disease causing subepidermal split
- BP180, BP230
- ≥70yo
signs and symptoms of bullous pemphigoid (3)
- <30% with oral lesions
- pruritus
- tense intact blisters with background erythema
treatment of bullous pemphigoid (3)
- topical corticosteroids
- dapsone/tetracycline (antibiotics)
- prednisolone, azathioprine, mycophenolate
bullous pemphigoid age group
≥70yo
describe mucous membrane pemphigoid (what, targets, demographic)
- acquired autoimmune disease characterised by blistering of mucous membranes
- BP180, laminin 332 (possibly BP230, integrins, collagen VII)
- older females (60-70yo)
mucous membrane pemphigoid antigens (up to 5)
BP180 and laminin 332
possibly BP230, integrins, collagen VII
mucous membrane pemphigoid demographic
older females 60-70yo
oral s/s of MMP (2)
- desquamative gingivitis
- yellow ulcers with background erythema
management of MMP (5)
- topical as per RAS +/- intralesional triamcinolone
- dapsone
- hydroxychloroquine
- if severe = prednisolone + azathioprine/mycophenolate/rituximab
- vaccines needed pre-tx
describe pemphigus vulgaris (what, targets, demographic)
- acquired autoimmune mucocutaneous blistering disease causing suprabasal acantholysis
- desmoglein 3 +/- 1
- 40-60yo female, Asian, Jewish
pemphigus vulgaris demographic
middle aged females 40-60yo
Asian and Jewish
s/s of pemphigus vulgaris (7)
- fragile bullae/erosions on normal background mucosa/skin
- +/- peeling, flaking, crusting
- acute paronychia
- bright red eyes
- perioral erosions and secondary infection
- oral erosions/excoriations, ragged friable gingivae
- positive Nikolsky’s sign
what is positive Nikolsky’s sign? (2)
- sign of blistering condition
- shearing pressure on skin/mucosa = layer of skin will shear off
(very tender and not recommended)
pemphigus vulgaris antigen
desmoglein 3 +/- 1
pemphigus vulgaris DIF result
intercellular IgG and C3