Osteochondral lesions of the femoral head are uncommon and few studies have reported their imaging findings. Since joints are at risk of early degeneration after osteochondral damage, timely recognition is important. Osteochondral lesions of femoral head may often be necessary to differentiate from avascular necrosis. Here, we report a case of osteochondral lesions on bilateral femoral heads. This lesion manifested as subchondral cysts in initial radiographs, which led to further evaluation by computed tomography arthrography and magnetic resonance imaging, which revealed overlying cartilage defects.
Female ; Hip Joint/abnormalities/*radiography ; Humans ; Magnetic Resonance Imaging ; Osteochondritis/*diagnosis ; Patients ; Sports ; Tomography, X-Ray Computed ; Young Adult

BACKGROUND: The aim of this study was to answer the following two questions: 1) Do the radiological parameters of dysplasia have significant correlations between themselves or with the parameters of the proximal femoral deformity and vice versa? 2) Do the physical parameters have a significant correlation with the radiological parameters of hip dysplasia and proximal femoral deformity? METHODS: Four hundred and twenty eight consecutive patients with no clinical evidence of hip osteoarthritis and who underwent pelvic radiography in the supine position for hip contusion or a routine health check were analyzed for the relationships between the center-edge (CE) angle, acetabular depth, acetabular angle, the head-neck ratio and the neck-shaft angle as well as the relationships of the above-mentioned variables with age, gender, body height and the body mass index. RESULTS: The CE angle, acetabular depth and acetabular angle showed a strong correlation with each other. The neck-shaft angle and the head-neck ratio showed no correlation with each other or with the CE angle, acetabular depth and acetabular angle. Age was positively associated with the CE angle, and inversely associated with the acetabular depth or acetabular angle. Male gender was significantly associated with the increased neck-shaft angle, and inversely associated with the head-neck ratio. CONCLUSIONS: The radiological parameters of hip dysplasia are all strongly, if not perfectly, inter-correlated. Age was associated with the radiological parameters of hip dysplasia whereas gender was associated with the radiological parameters of a proximal femoral deformity.
Acetabulum/*abnormalities/radiography ; Adolescent ; Adult ; Age Factors ; Aged ; Aged, 80 and over ; Biomechanics ; Body Height ; Body Mass Index ; Female ; Femur Head/*abnormalities/radiography ; Femur Neck/*abnormalities/radiography ; Hip Dislocation, Congenital/radiography ; Hip Joint/*abnormalities/radiography ; Humans ; Linear Models ; Male ; Middle Aged ; Republic of Korea ; Sex Factors ; Young Adult

OBJECTIVETo observe the leg length discrepancy and accompanied knee varus/valgus deformity in matured patients with unilateral dislocation of the hip.

METHODSFrom March 2011 to December 2012, 28 patients who had unilateral dislocation of hip (Hartofilakidis classification II 17 cases and III 11 cases) were involved in this study.There were 6 male patients and 22 female patients, the age of the patients were 13.4-66.2 years, with mean age of 29.8 years. The standing anteroposterior full leg length X-ray films were obtained. Leg length discrepancy, the length of the femur, the length of the tibia and identified the varus/valgus knee deformities were measured. Statistical analysis was performed. A student's t test for paired samples was done for comparison of the parameters in the same patient between dislocated and undislocated leg, and the χ(2) test were used to assess valgus and varus knees, leg length discrepancy in high dislocation and low dislocation groups.

RESULTSSeventeen (60.7%) cases had longer femur length on the dislocated side than that on the undislocated side (t = 1.328, P = 0.197), with the maximum lengthening of 32.7 mm and a mean lengthening of 9.5 mm. Twenty-one (75.0%) cases had longer tibia length on the dislocated side (t = 3.039, P = 0.006), with a maximum lengthening of 10.9 mm and a mean lengthening of 4.5 mm. Twenty (71.4%) cases had longer relative leg length on the dislocated side (t = 2.451, P = 0.022), with a maximum lengthening of 25.0 mm and a mean lengthening of 9.4 mm. On the dislocated side of the leg, the degree of valgus angle was 3° ± 4°,while on the undislocated side, that was -3° ± 4°(t = 5.642, P = 0.000). On the dislocated side, 12 cases (42.9%) were of valgus deformities and 1 case was of varus deformity. On the contralateral side, 15 cases of varus deformities (53.6%) and 1 case of valgus deformity were observed(χ(2) = 18.139,P = 0.000).

CONCLUSIONSMost dislocated legs are longer in length than the contralateral side, both femur and tibia have also lengthened accordingly. Many knees on the dislocated side present valgus deformity, half of the knees on the contralateral side present varus deformity.

Adolescent ; Adult ; Aged ; Female ; Femur ; abnormalities ; diagnostic imaging ; Hip Dislocation, Congenital ; complications ; radiotherapy ; Humans ; Knee Joint ; abnormalities ; diagnostic imaging ; Leg Length Inequality ; diagnostic imaging ; etiology ; Male ; Middle Aged ; Radiography ; Tibia ; abnormalities ; diagnostic imaging ; Young Adult