Prevalence of Malformations of the Hip Joint and Their Relationship to Sex, Groin Pain, and Risk of Osteoarthritis

Abstract

In our study population, a deep acetabular socket and a pistol grip deformity were common radiographic findings and were associated with an increased risk of hip osteoarthritis. The high prevalence of osteoarthritis in association with malformations of the hip joint suggests that an increased focus on early identification of malformations should be considered.

The prevalence of radiographic femoroacetabular impingement in younger individuals undergoing total hip replacement for osteoarthritis

“…This may explain why we observed more pincer cases despite reports that mixed-type impingement is the most common. Our gender distribution for impingement type, however, was consistent with previous literature [5,[12][13][14]. Moreover, many of the subjects had radiographic end-stage OA, which made it difficult to exclude FAI (e.g., it was challenging to distinguish an osteophyte from a pistol grip deformity).…”

“…The authors attributed this high prevalence of FAI in asymptomatic males to MRI imaging for its ability to better detect FAI signs. The heterogeneity-including patient populations evaluated, imaging modalities used, and definitions for FAI-of the studies described above makes it challenging to compare prevalence figures [12][13][14][15][16][17]. From the radiographs that we could accurately assess, 27 of 52 subjects (52 %) had FAI, a number lower than that reported by Ochoa et al [15] and Tanzer and Noiseux [17] but closer to the findings of Gosvig et al [13] and Kim et al [16].…”

“…These findings add to the limited epidemiologic data available on the burden of FAI. The prevalence rates reported to date span a wide range, reflecting differences in the populations sampled, imaging modality used, and the criteria used to define FAI [5,[12][13][14].…”

“…More recently, in a cross-sectional population-based study that included 3,620 subjects (36.7 % male, 63.2 % female), Gosvig et al reported the prevalence of hip OA to be 9.5 % in men and 11.2 % in women [13]. Among these subjects with hip OA, 71 % of males and 36.6 % of females had a concomitant hip malformation associated with FAI [13]. Of interest, new data are also emerging on the prevalence of cam-type deformities in asymptomatic individuals.…”

“…The heterogeneity-including patient populations evaluated, imaging modalities used, and definitions for FAI-of the studies described above makes it challenging to compare prevalence figures [12][13][14][15][16][17]. From the radiographs that we could accurately assess, 27 of 52 subjects (52 %) had FAI, a number lower than that reported by Ochoa et al [15] and Tanzer and Noiseux [17] but closer to the findings of Gosvig et al [13] and Kim et al [16]. Our sample of 52 subjects with both AP and lateral films available is one of the limitations of our study.…”