Cam Type FAI is a Cause of Hip Pain in the Young Adult and a Precursor to OA

Inclusion Criteria: * Skeletally mature patient undergoing cam resection by hip arthroscopy with hip pain longer than 6 months * Absence of arthritis (Tonnis Grade 0 or 1) * Absence of dysplasia (LCEA \> 25°) or overcoverage (LCEA \> 39°) * Alpha angle greater than 55° on multiplanar imaging * Subject is over the age of 18 years old at time of enrollment * Subject is willing and able to complete required study visits and assessments * Subject is willing to sign the approved Informed Consent Form Group 2 Inclusion Criteria: * Normal femoral head neck contour and no evidence of dysplasia * Subject is over the age of 18 years old at time of enrollment * Subject is willing and able to complete required study visits and assessments * Subject is willing to sign the approved Informed Consent Form Exclusion Criteria: * Prior joint replacement surgery in any lower-limb joint due to OA * History of lower-limb joint or back injury in the last year that impairs mobility * Metallic prosthesis * Worked with metal, metal fragments in the eye * Blood transmittable disease(s) * In vivo devices (Aneurysm clip(s), Pacemaker, ICD, Implanted hearing device) * Extreme claustrophobia * Overweight or obese (BMI \> 30) and/or waist circumference \>102cm in men and \>88cm in women * Diagnosis of Parkinson's or uncontrollable tremors * Known history of early OA in the immediate family * Pregnant, Breastfeeding, or planning to get pregnant * Cognitive impairment that prevents accurate completion of…