Illustration (A) and photograph (B) reveals unilateral (left side) femoral nerve variant. The femoral nerve (a) emerged bilaterally lateral and deep to the psoas major muscle (PM). While the right femoral nerve maintained its usual path, the left femoral nerve was pierced (arrowhead) and divided into two separate divisions by an accessory slip of the iliacus muscle (*). These two separate divisions of the femoral nerve converged (double arrowheads) into a single division (b) and divided into its usual branches. Also labeled bilaterally is the iliacus muscle (Il). (Original anatomical illustration by Frank Scali, DC).