Hypercoagulable state:
(1) antiphospholipid syndrome
(2) paroxysmal nocturnal hemoglobinuria (PNH)
Vasculitis:
(1) polyarteritis nodosa
(2) systemic lupus erythematosus
(3) Henoch-Schonlein purpura
(4) other
Intravascular event:
(1) cholesterol crystal embolism
(2) interventional radiology involving the hepatic artery
(3) infusion of a toxic chemical into the hepatic artery, including chemotherapeutic agents
(4) sickle cell anemia
(5) severe atherosclerosis
Infection related:
(1) Kawasaki disease
(2) cholangiopathy associated with septic shock
(3) AIDS-related cholangiopathy
Surgery-related:
(1) liver transplant
(2) postcholecystectomy stricture
Other:
(1) hypereosinophilia syndrome
(2) radiation field that includes the biliary system
(3) hereditary hemorrhagic telangiectasia (HHT, due to blood diverted through vascular shunts)
(4) arterial compression due to tumor or abscess
