What are the histologic findings of a draining sinus tract in hidradenitis suppurativa (HS)?

Updated: Nov 20, 2020
  • Author: Marina Jovanovic, MD, PhD; Chief Editor: William D James, MD  more...
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The draining sinus tracts extend predominantly into the dermis and are lined by a variably thickened stratified epithelium; they extend in the form of dissecting tracts, which burrow through the necrotic tissue. The epithelium is constantly breaking down; therefore, the sinus tract is not completely lined with epithelium. [84] As previously mentioned, the 3 phenotypes (see Other Tests) of stratified squamous epithelia reflect the dynamic processes of inflammation, proliferation, and stratification that occur in hidradenitis suppurativa. [79]

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