BACKGROUND: Cam deformity is a preosteoarthritic malformation causing premature hip-joint degeneration. While the pathogenetic pathway from deformity to osteoarthrosis (OA) has been well established, almost nothing is known of the malformation's epidemiology. PURPOSE: To determine the distribution of cam deformity in a large, unselected cohort from standardized anteroposterior (AP) pelvic radiographs. MATERIAL AND METHODS: The distribution of cam deformity was assessed in 3202 (1184 male, 2018 female) standardized AP pelvic radiographs using the triangular index (TI) and the alpha angle. The relationships between cam malformation and self-reported hip pain were evaluated, and the relative importance of known risk factors for cam malformation estimated. RESULTS: We found a pronounced sex-related difference in cam-deformity distribution. The overall prevalence of cam deformity was approximately 17% in men and 4% in women. The distribution of cam deformity was unaltered in subjects with normal joint-space width or other features of hip-joint degeneration. We found no significant association with self-reported hip pain, nor did we find any relative importance of possible risk factors for hip deformity, such as body-mass index (BMI), occupational exposure to heavy workloads, or concomitant acetabular dysplasia. CONCLUSION: The results lend support to the thesis that cam deformity represents a silent slipped capital epiphysis, predominantly in men, and that it is a far from uncommon deformity in subjects with no apparent evidence of hip-joint osteoarthritis.
BACKGROUND:Camdeformity is a preosteoarthritic malformation causing premature hip-joint degeneration. While the pathogenetic pathway from deformity to osteoarthrosis (OA) has been well established, almost nothing is known of the malformation's epidemiology. PURPOSE: To determine the distribution of camdeformity in a large, unselected cohort from standardized anteroposterior (AP) pelvic radiographs. MATERIAL AND METHODS: The distribution of camdeformity was assessed in 3202 (1184 male, 2018 female) standardized AP pelvic radiographs using the triangular index (TI) and the alpha angle. The relationships between cam malformation and self-reported hip pain were evaluated, and the relative importance of known risk factors for cam malformation estimated. RESULTS: We found a pronounced sex-related difference in cam-deformity distribution. The overall prevalence of camdeformity was approximately 17% in men and 4% in women. The distribution of camdeformity was unaltered in subjects with normal joint-space width or other features of hip-joint degeneration. We found no significant association with self-reported hip pain, nor did we find any relative importance of possible risk factors for hip deformity, such as body-mass index (BMI), occupational exposure to heavy workloads, or concomitant acetabular dysplasia. CONCLUSION: The results lend support to the thesis that camdeformity represents a silent slipped capital epiphysis, predominantly in men, and that it is a far from uncommon deformity in subjects with no apparent evidence of hip-joint osteoarthritis.
Authors: Rita Lung; Julie O'Brien; Julia Grebenyuk; Bruce B Forster; Mary De Vera; Jacek Kopec; Charles Ratzlaff; Donald Garbuz; Helen Prlic; John M Esdaile Journal: Clin Rheumatol Date: 2012-05-03 Impact factor: 2.980
Authors: Amir A Jamali; Walter Mak; Ping Wang; Lynn Tai; John P Meehan; Ramit Lamba Journal: Clin Orthop Relat Res Date: 2013-08-07 Impact factor: 4.176
Authors: Sasha Carsen; Paul J Moroz; Kawan Rakhra; Leanne M Ward; Hal Dunlap; John A Hay; R Baxter Willis; Paul E Beaulé Journal: Clin Orthop Relat Res Date: 2014-02 Impact factor: 4.176
Authors: Edwin R Cadet; Oladapo M Babatunde; Prakash Gorroochurn; Andrew K Chan; Agata Stancato-Pasik; Marc Brown; Skylar Johnson; Philip Burns Kaiser; Thomas R Gardner; Olufemi R Ayeni Journal: Knee Surg Sports Traumatol Arthrosc Date: 2014-09-26 Impact factor: 4.342