Intraarticular findings in symptomatic developmental dysplasia of the hip.
BACKGROUND
The purpose of this study was to examine intraarticular pathology in patients younger than 20 years with symptomatic developmental dysplasia of the hip.


METHODS
We performed hip arthroscopy during corrective osteotomy in 23 hips in 22 patients. All patients were female, and the average age at operation was 16.4 years. Eighteen hips were in a prearthritic stage, and 5 hips were in an early stage. The presence and location of cartilage degeneration and labral tears were evaluated. Second-look arthroscopy was performed in 13 hips in 12 patients.


RESULTS
Fourteen hips (77.8%) in the prearthritic stage had cartilage degeneration. Cartilage lesions were more frequent in the acetabulum than in the femoral head (72.2% vs 16.7%). Sixty-one percent of acetabular lesions were located at the anterosuperior area. Labral tears were observed in 77.8% of hips in prearthritic stages located at the anterosuperior (72.2%) and superior (44.4%) areas. The degree of cartilage and labral lesions in the early stage was more severe than in the prearthritic stage. On second-look arthroscopy, there were no changes in the state of the cartilage and labrum in the majority (84.6%) of hips.


CONCLUSIONS
The incidence of intraarticular lesions in developmental dysplasia of the hip was high, even in the prearthritic stage. These lesions tended to originate in the anterosuperior area of the acetabulum and were generally progressive.
Fujii
Masanori
M
Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
Nakashima
Yasuharu
Y
Jingushi
Seiya
S
Yamamoto
Takuaki
T
Noguchi
Yasuo
Y
Suenaga
Eiji
E
Iwamoto
Yukihide
Y
D000077:Acetabulum / Q000473:pathology; D000293:Adolescent; D001182:Arthroscopy / Q000379:methods*; D002358:Cartilage, Articular / Q000473:pathology*; D002648:Child; D018450:Disease Progression; D005260:Female; D005270:Femur Head / Q000473:pathology; D006618:Hip Dislocation, Congenital / Q000473:pathology* / Q000601:surgery; D006801:Humans; D015207:Osteoarthritis, Hip / Q000209:etiology / Q000473:pathology*; D012720:Severity of Illness Index; D013997:Time Factors; D055815:Young Adult