Abstract: A prosthetic femoral implant for use in hip arthroplasty comprises an elongate femoral stem. In addition, the femoral implant comprises a femoral neck having a central axis, a first end integral with the femoral stem, and a second end distal the femoral stem. A transverse cross-section of the femoral neck includes a medial-lateral axis and an anterior-posterior axis. Moreover, a reference circle bisected by the medial-lateral axis and passing through the medial-most point and the lateral-most point has a diameter equal to a maximum medial-lateral width Wml of the transverse cross-section and an area A1. The lateral-most anterior segment of the transverse cross-section includes a laterally expanded area extending outside the reference circle, the laterally expanded area having an area A2 that is at least 7% of one-fourth of the area A1 of the reference circle.