Difference between revisions of "Bullous diseases"

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==Bullous pemphigoid==
==Bullous pemphigoid==
===Epidemiology===
===General===
*Less serious the ''pemphigus vulgaris''.
 
Epidemiology:
*Old people (60-80 year olds).
*Old people (60-80 year olds).
Clinical
*Extreme pruritis.
Etiology:
*Antibodies to BPAG2.
===Microscopic===
Features:<ref name=Ref_PBoD8_1195>{{Ref PBoD8|1195}}</ref>
*Subepidermal blisters.
*+/-Lymphocytes.
*+/-Eosinophils.
*+/-Neutrophils.
Notes:
*Epidermis not affect, i.e. non-acantholytic.
*Linear Ig deposits along basement membrane.


==Pemphigus vulgaris==
==Pemphigus vulgaris==

Revision as of 03:47, 21 March 2011

Bullous disease happens. Dermatopathologists help diagnose it.

DDx of bullous disease:[1]

  • Bullous pemphigoid.
  • Pemphigus vulgaris.
  • Porphyria cutanea tarda.
  • Dermatitis herpetiformis.
  • Epidermolysis bullosa.

Bullous pemphigoid

General

  • Less serious the pemphigus vulgaris.

Epidemiology:

  • Old people (60-80 year olds).

Clinical

  • Extreme pruritis.

Etiology:

  • Antibodies to BPAG2.

Microscopic

Features:[2]

  • Subepidermal blisters.
  • +/-Lymphocytes.
  • +/-Eosinophils.
  • +/-Neutrophils.

Notes:

  • Epidermis not affect, i.e. non-acantholytic.
  • Linear Ig deposits along basement membrane.

Pemphigus vulgaris

General

Classic presentation:

  • Mouth lesions.
  • Non-pruritic.

Treatment:

  • Prednisone then steroid sparing agent.

Epidemiology:

  • Associated with thymoma, myasthenia gravis, malignancy & D-penicillamine (used to Tx Wilson's disease).
  • Middle age.

Microscopic

Features:[3]

  • Suprabasilar blistering.

DDx: Hailey-Hailey disease.

Images:

Notes:

  • Desmoglein 1, desmoglein 3 - abnormal.

Dermatitis herpetiformis

Assoc. with celiac sprue.

Porphyria cutanea tarda

Etiology

  • Genetic, autosomal dominant.

Appearance

  • Vesicles/bullae in photoexposed areas subjected to trauma.

Associations

Medications/Substances:

Non-infection chronic conditions:

Infections:

Treatment

  • d/c aggravating substances (listed above), phlebotomy, hydroxychloroquine if phlebotomy contraindicated.

Epidermolysis bullosa

  • Inherited, bullae & erosions from slight mechanical trauma.

See also

References

  1. TN07 D21-3.
  2. Kumar, Vinay; Abbas, Abul K.; Fausto, Nelson; Aster, Jon (2009). Robbins and Cotran pathologic basis of disease (8th ed.). Elsevier Saunders. pp. 1195. ISBN 978-1416031215.
  3. Kumar, Vinay; Abbas, Abul K.; Fausto, Nelson; Aster, Jon (2009). Robbins and Cotran pathologic basis of disease (8th ed.). Elsevier Saunders. pp. 1193. ISBN 978-1416031215.
  4. URL: http://www.dermpedia.org/baby-dermpedia-for-beginners/pemphigus-vulgaris. Accessed on: 20 March 2011.