“…Young patients especially may not be able to differentiate among groin pain, lateral hip pain, or low back pain, and often it is up to the clinician to tease out the Downloaded by [New York University] at 20:39 31 July 2015 pertinent anatomical and historical details that may help guide the differential diagnosis. 9,12,20 Given the proximity of the hip joint to other important anatomical structures, including the lumbosacral spine, reproductive organs, and gastrointestinal tract, referred or radiating pain must be distinguished from primary intra-articular hip pain. Any unexpected symptoms, including the atraumatic, insidious onset of pain associated with weight loss, fevers, night pain, or malaise, must be evaluated in further detail to rule out potential inflammatory, infectious, or malignant etiologies.…”