= “flexion, abduction, and external rotation” as used in term Faber Test. The is an test to usually used to evaluate pain and a positive test (aggreviation of pain) confirms pain due to sacroiliac or hip abnormalities. It is performed with the patient lying supine with the involved side’s leg being flexed at the hip and knee, abducted at the hip and its ankle lying on th either leg’s knee (legs form a figure “4”). Examiner pushes down on flexed knee of involved limb while stabilizing contralateral anterior iliac crest.