Abstract Number: 11

Perianal ulceration misdiagnosed as pyoderma gangrenosum

R.B. Saunderson, A.B. Watson

Meeting: 2015 Dermcoll

Session Information

Date: -

Session Title: Registrars’ Forum

Session Time: -

Pyoderma gangrenosum is a diagnosis of exclusion and
misdiagnosis can result in substantial complications for
patients with other causes of cutaneous ulceration. We
present the case of a 70-year-old female with severe
perianal ulceration with a diagnosis of pyoderma
gangrenosum, which worsened with immunosuppressive
therapy. Extensive investigations revealed the cause to be
herpes simplex virus type 1. A review of the literature was
undertaken and revealed the misdiagnosis of pyoderma
gangrenosum is not uncommon and alternative diagnoses
need to be considered prior to commencement of immunosuppressive
therapy. With increased utility of immunosuppressive
therapy, herpes simplex virus is increasingly
recognised as a cause of severe perianal ulceration.