True aneurysm of the lateral circumflex femoral artery - A case report and comprehensive review.

True femoral circumflex artery aneurysms are a rare clinical entity. There are limited data available on their incidence, diagnosis, and management. While rare, their significance lies in potential complications such as rupture or limb-threatening ischemia. The objective of this study is to present a new case in a 56-year-old male patient who presented with an expanding mass in his right thigh caused by a 90x50x70 mm lateral circumflex femoral artery aneurysm which was compressing the common femoral vein. No other aneurysms were found. The aneurysm sac was embolized, followed by proximal ligation, achieving complete exclusion of the aneurysm. We also systematically reviewed the PubMed and Scopus databases for true circumflex artery aneurysms, finding only six case reports documented, all of which were treated with resection and ligation. While open surgery has conventionally been the primary approach, endovascular techniques may play a role in enhanced treatment for these aneurysms.