RT Journal Article T1 Patterns of the circumflex femoral arteries revisited A1 Vázquez Osorio, María Teresa A1 Murillo González, Jorge Alfonso A1 Maranillo Alcaide, Eva A1 Parkin, Ian A1 Sañudo Tejero, José Ramón AB Knowledge of variations of the circumflex femoral arteries is important when undertaking clinical procedures within the femoral region and in hip joint replacement. Since the 19th century, many different patterns have been proposed to classify their origins. This work studied a statistically reliable sample, the lower limbs of 221 embalmed human cadavers (equal right–left and approximately equal sex distributions), and reviewed the previous literature to propose a unified and simple classification that will be useful to clinicians. Statistical comparisons were made using the chi(2) test. The medial and lateral circumflex femoral arteries have been classified into three different patterns based on the levels of their origin. Distribution related to sex and side was also studied. Pattern I: Both arteries arose from the deep femoral artery (346 cases, 78.8%). This pattern was more frequent in females, P = 0.01. There was no significant difference between sides. Type Ia, medial circumflex femoral artery origin was proximal to the lateral circumflex femoral artery origin (53.2%); Type Ib, lateral circumflex femoral artery origin was proximal to medial circumflex femoral artery origin (23.4%); Type Ic, both arteries arose from a common trunk (23.4%). Pattern II: One of the arteries arose from the femoral artery and the other from the deep femoral artery (90 cases, 20.5%). Type IIa, the medial circumflex femoral artery arose from the femoral artery (77.8%) and Type IIb, the lateral circumflex femoral artery arose from the femoral artery (22.2%). There were no significant differences between sexes or sides. Pattern III: Both arteries arose from the femoral artery (2 cases, 0.5%). In every disposition there was a significantly higher prevalence of unilateral rather than bilateral occurrence. In one dissection the medial circumflex femoral artery was absent. Awareness of these variations could avoid unexpected injuries. PB Wiley SN 0897-3806 SN 1098-2353 YR 2006 FD 2006-04-14 LK https://hdl.handle.net/20.500.14352/102606 UL https://hdl.handle.net/20.500.14352/102606 LA eng NO Vazquez MT, Murillo J, Maranillo E, Parkin I, Sanudo J. Patterns of the circumflex femoral arteries revisited. Clin Anat. 2007 Mar;20(2):180-5. DS Docta Complutense RD 20 jul 2024