Mycotic aneurysm in a free flap

Successful facial artery pseudoaneurysm coiling and pedicle preservation following free tissue transfer

Patients undergoing free tissue reconstruction are at risk for development of an anastomotic pseudoaneurysm, which may present as delayed neck hemorrhage or a pulsatile neck mass. Diagnosis may be achieved by noninvasive imaging, angiography, and exploration. Management strategies for head and neck pseudoaneurysms have included open vessel ligation, open direct vessel repair, endovascular parent vessel embolization, and, most recently, endovascular pseudoaneurysm embolization. In patients with anastomotic pseudoaneurysms where adequate flap inosculation is doubted, endovascular pseudoaneurysm embolization with pedicle preservation may be an appropriate primary treatment approach. We discuss the successful endovascular coiling of an external carotid artery branch anastomotic pseudoaneurysm in a patient one month after free tissue reconstruction of a total laryngopharyngectomy and partial glossectomy defect.

Acute vasculitis resulting in free flap failure: the importance of early recognition and options for management

Unusual or unexpected medical causes for free flap failure do occur but are uncommon. We present a rare case of a fibula free flap failure due to an acute vasculitis which was undiagnosed until after the flap had failed. In addition to two successful flap salvages and intravenous heparin, an epoprostenol infusion was commenced but a third salvage was not successful. The vasculitis resulted in marked blood vessel wall thickening, and cutaneous manifestations which presented as late signs. High peri-nuclear anti nuclear cytoplasmic antibody (pANCA) and myeloperoxidase (MOP) titres were subsequently found and histology from several blood vessels showed marked inflammation throughout the wall. A diagnosis of microscopic polyangiitis was made and high dose steroids were subsequently commenced. Interestingly, he had vasculitis several years previously treated with oral steroids but had been discharged from the rheumatology clinic. This rare case illustrates the potential hazards of free flap surgery in the vasculitides and discusses the warning signs and various management options to reduce the likelihood of flap failure in these patients.

Complete survival of a free flap after early pseudoaneurysm formation and pedicle thrombosis

A microsurgical pseudoaneurysm is a very rare complication after free flap surgery. The authors report a case of a free thoracodorsal artery perforator flap transferred to a degloving wound on the dorsum of the foot and ankle. The patient developed pedicle thrombosis caused by a septic pseudoaneurysm, which was treated by conservative means. Sufficient vascularization developed within 15 days after surgery and the flap survived completely. This is in sharp contrast to other reported cases of pseudoaneurysm formation, all of which were treated surgically and resulted in flap failure, except in one case. A critical review of the literature is presented and the factors influencing flap survival are discussed.