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  • Cellulitis
  • Cellulitis is an acute, subacute, or chronic infection of the dermis and subcutaneous tissue.
  • Erysipelas
  • Erysipelas is a bacterial infection of the dermis and upper subcutaneous tissue hallmarked by a well-defined, raised edge reflecting the more superficial (dermal) involvement.
  • Impetigo
  • Impetigo is a contagious superficial pyogenic infection of the skin, that usually begins as vesicles with a very thin, fragile roof consisting only of stratum corneum.
  • Non-bullous impetigo (or impetigo contagiosa of Tilbury Fox):
  • Bullous impetigo
  • Ecthyma
  • Ecthyma is a pyogenic infection of the skin characterized by the formation of adherent crusts, beneath which ulceration occurs.
  • Furuncle (boil)
  • Furuncle is an acute, usually necrotic, infection of a hair follicle with Staphylococcus aureus.
  • Sycosis
  • Sycosis is a subacute or chronic pyogenic infection involving the whole depth of the follicle.
  • Lupoid sycosis (ulerythema sycosiforme): sycosis in which the follicles are destroyed with clinically evident scarring.
  • Folliculitis decalvans: sycosis involving the scalp.
  • Erythrasma
  • Erythrasma is a mild, chronic, localized superficial infection of the skin caused by a group of closely related aerobic coryneform bacteria, usually known as Corynebacterium minutissimum.


  • Dermatitis vegetans (pyoderma vegetans)
  • Dermatitis vegetans is a condition of uncertain etiology characterized by the development of epithelial hyperplasia and chronic granulomatous changes.


  • Perifolliculitis capitis (abscedens et suffodiens; dissecting cellulitis of the scalp)
  • Perifolliculitis capitis is a rare, chronic, suppurative disease of the scalp.


  • Suppurative hidradenitis (apocrinitis; hidradenitis suppurativa)
  • Suppurative hidradenitis is a chronic relapsing inflammatory disease originating in apocrine gland follicles, which may become chronic and often indolent due to subcutaneous extension with induration, scarring, destruction of skin appendages and sinus formation.


  • Erysipeloid
  • Erysipeloid is an acute, rarely chronic, infection with Erysipelothrix rusiopathiae.


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References

  1. Rook, Arthur (2010). Rook's textbook of dermatology. Chichester, West Sussex, UK Hoboken, NJ: Wiley-Blackwell. ISBN 1405161698.