Pseudoaneurysm of the subclavian artery due to Xanthomonas pneumonia in a patient with acute myeloid leukemia: Its rupture treated by transcatheter coil embolization

A 52-year-old male with acute myeloid leukemia developed pseudoaneurysm of the subclavian artery. Pneumonia due to Xanthomonas maltophilia, which was multi-drug resistant, progressed to a lung abscess even under administratio n of antibiotics. This lung infection contiguous to the left carotid and su bclavian arteries was suggested to have caused the pseudoaneurysm of the su bclavian artery, The rupture of the aneurysm by penetration to the trachea amounted to about 1,000 mi of bleeding; fortunately the bleeding ceased spo ntaneously, Nonetheless, an emergency transcatheter coil embolization preve nted re-bleeding. Endovascular treatment should be considered especially fo r aneurysms which develop in patients with underlying diseases.