What is your preliminary diagnosis of this patient The right lower limb is noticeably shorter than the left. The right limb is externally rotated, and the patient is unable to change the limb s position without considerable pain.On palpation , the groin region is tender, but no swelling is obvious. Passive movement of the hip causes extreme pain, especially upon external and internal rotation. WBC is 20 Hemoglobin (Hgb) is 9.8