Rapidly Progressive Arthritis in Femoroacetabular Impingement: Patient Characteristics and Risk Factors for Total Hip Arthroplasty by the Age of Forty.

When compared to controls with symptomatic FAI, rapidly progressive cases did not demonstrate major differences in cam deformity magnitude. Thus severity of bony deformity may only be one aspect of a multifactorial etiology of hip OA progression in FAI..