Skin-nontumor / Clinical Dermatology

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Skin-nontumor / Clinical Dermatology

Infectious disorders

Impetigo

Reviewer: Mowafak Hamodat, MB.CH.B, MSc., FRCPC (see Reviewers page)
Revised: 5 September 2011, last major update July 2011
Copyright: (c) 2002-2011, PathologyOutlines.com, Inc.

General
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● See also bullous impetigo
● Usually affects hands and face of normal children or adults in poor health
● Common, due to Staphylococcus or Streptococcus infection (Cutis 2010;85:65)

Clinical description
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● Erythematous macule

Clinical images
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Various images

Micro description
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● Early lesions show subcorneal collection of neutrophils with exocytosis through the underlying epidermis
● A few acantholytic cells may be seen, but are never prominent
● Gram-positive cocci are usually easily found in the surface crust
● In contrast to staphylococcal “scalded skin” syndrome, there is usually a mild to moderate mixed inflammatory cell infiltrate in the underlying papillary dermis

End of Skin-nontumor / Clinical Dermatology > Infectious disorders > Impetigo

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