Toe necrosis due to an arterial embolism revealing a Takayasu's arteritis.

A woman in her 30s with a 15-pack-year smoking history and psoriatic arthritis for 13 years suddenly developed right fifth-toe necrosis ([figure 1][1]). She had suffered from sacroiliac joint and calf pain for several years, but 1 month ago the pain suddenly increased. The systolic blood pressure