Pyoderma gangrenosum with pathergy in a pregnant patient without associated systemic disease.

Pyoderma gangrenosum (PG) is a rare chronic ulcerative skin condition often associated with systemic disease. PG associated with pregnancy is an extremely rare presentation; only 9 other cases have been reported in the literature. We present PG in a pregnant patient (third trimester) with pathergy. No associated systemic disease was identified. Histology was consistent with PG and the lesions responded to intralesional triamcinolone therapy.