What are signs of perianal hidradenitis suppurativa (HS)?

Updated: Nov 20, 2020
  • Author: Marina Jovanovic, MD, PhD; Chief Editor: William D James, MD  more...
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The signs of perianal hidradenitis suppurativa may be clinically identical to the cutaneous manifestations of Crohn disease. Crohn disease may be complicated by a variety of skin manifestations, and hidradenitis suppurativa has been reported to precede or complicate Crohn disease. [12, 62, 63] In examining patients with perianal hidradenitis suppurativa, Church et al noted that Crohn disease coexisted with perianal hidradenitis suppurativa in 39% of patients. [64] Local swelling and inflammation associated with Crohn disease may precipitate hidradenitis suppurativa in patients already prone to it. However, the coexistence of Crohn’s disease and hidradenitis suppurativa does not explain the frequent presence of axillary, groin, and buttock involvement, which may imply a constitutional or genetic predisposition to hidradenitis suppurativa in patients with rectal Crohn disease. [12]

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