A case of primarily facial pyoderma gangrenosum associated with Takayasu arteritis.

Pyoderma gangrenosum (PG) is a type of neutrophilic dermatosis that shows noninfectious ulcers characterized by neutrophil infiltration of the skin.1 PG is frequently associated with systemic diseases such as inflammatory bowel disease, rheumatoid arthritis, and hematologic disorders.2 In Japan, PG is also a well-known complication of Takayasu arteritis (TA), yet only a few anecdotal reports are recorded worldwide.3,4 Typically, patients with PG show skin lesions on the lower extremities; however, the PG lesions associated with TA are known to be more widespread than those without TA.