Spontaneous Intercostal Artery Bleeding in a Patient With Buerger's Disease: A Case Report.

Intercostal artery (ICA) injury and bleeding are well-known complications of thoracic procedures and trauma; however, spontaneous ICA bleeding is a rare condition usually associated with specific underlying disorders that typically lead to the weakening of vasculature. Herein, we present a 42-year-old male with a history of Buerger's disease who developed spontaneous bleeding of the second left ICA after undergoing lower limb angioplasty. The bleeding was complicated by a large hemothorax and retropleural hematoma, resulting in hemorrhagic shock that necessitated massive transfusion, embolization, and eventual thoracotomy with evacuation.