Endovascular Treatment of Distal False Lumen Aneurysmal Expansion in Chronic Type B Aortic Dissection with True Lumen Occlusion.

Aneurysmal degeneration of distal false lumen after primary endovascular exclusion or open replacement of the proximal entry tear was not rare. Currently, no endovascular reintervention techniques have been established for this condition because of its pathological complexity, especially when the true lumen is severely stenosed or even occluded. In this report, we presented a case of chronic type B aortic dissection, whose false lumen of the abdominal aorta significantly expanded and true lumen occluded after the primary endovascular treatment of the proximal entry tear. Therefore, this-time endovascular treatment reconstructed the renal artery and lower limb artery through the false lumen. The 3-year follow-up computed tomography angiography confirmed that the reconstructed renal artery was patent and no endoleak was detected. Complete thrombosis and shrink of the aneurysmal false lumen were confirmed. Thus, endovascular treatment could be a feasible strategy for this subset of patients.