scholarly journals Femoral head-neck offset (femoroacetabular impingement)

2020 ◽  
Author(s):  
Joachim Feger
Keyword(s):  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Head Neck

The young arthritic hip

2011 ◽  
Author(s):  
Ahmad K. Malik ◽  
Aresh Hashemi-Nejad
Keyword(s):  
Rheumatoid Arthritis ◽  
Juvenile Idiopathic Arthritis ◽  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Acetabular Fracture ◽  
Developmental Dysplasia ◽  
Neck Fracture ◽  
Slipped Upper Femoral Epiphysis ◽  
Dysplasia Of The Hip ◽  
Head Neck

♦ Impingement:• Primary femoroacetabular impingement:▪ Cam type▪ Pincer type▪ Combined cam and pincer• Secondary femoroacetabular impingement:▪ Slipped upper femoral epiphysis (cam type)▪ Protusio (pincer type)▪ Retroverted acetabulum (pincer type)▪ Malunited femoral head/neck fracture (cam type)▪ Acetabular fracture (pincer type)▪ Perthes disease (cam type)♦ Instability:• Developmental dysplasia of the hip (treated/residual and untreated)• Dislocation• Subluxation• Dysplasia♦ Inflammatory:• Juvenile idiopathic arthritis• Rheumatoid arthritis.

Femoral head-neck offset measurements in 339 subjects: distribution and implications for femoroacetabular impingement

2012 ◽  
Vol 21 (5) ◽  
pp. 1212-1217 ◽  
Author(s):  
Christian R. Fraitzl ◽  
Thomas Kappe ◽  
Friederike Pennekamp ◽  
Heiko Reichel ◽  
Christian Billich
Keyword(s):  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Head Neck

scholarly journals Sclerotic lesions of the femoral head–neck junction for diagnosis of femoroacetabular impingement

2020 ◽  
Vol 28 (2) ◽  
pp. 230949902092416
Author(s):  
Takehito Hananouchi ◽  
Stephen Kenji Aoki
Keyword(s):  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Morphological Characteristics ◽  
Control Group ◽  
Diagnostic Feature ◽  
Pixel Intensity ◽  
Plain Radiographs ◽  
Sclerotic Lesions ◽  
Head Neck ◽  
Neck Junction

The morphological characteristics associated with a diagnosis of femoroacetabular impingement (FAI) observed on plain radiographs can also be seen in subjects without hip joint symptoms. Therefore, the purpose of this study was to investigate whether sclerotic lesions on femoral head–neck junction (FHNJ) could be used as a supplemental diagnostic feature. A total of 128 hips from 119 patients (43 male and 76 female) diagnosed with FAI and 24 hips from 21 patients (2 male and 19 female) with other hip pathologies as control were compared in this study. Using standing frog-leg plain radiographs, the prevalence of sclerotic lesions on the FHNJ was established. Additionally, the pixel intensity (PI) of the sclerotic lesions between the FAI and the control groups were quantitatively compared. Sclerotic lesions were present in 96.1% of FAI hips (123 of 128) and only 37.5% of control hips (9 of 24) ( p < 0.05). The ratio of PI in the FAI group was significantly higher (approximately 10%) than in the control group ( p < 0.05). The evaluation of sclerotic lesions may be used as a supplement to aid in the diagnosis of FAI.

scholarly journals Open MRI assessment of anterior femoroacetabular clearance in active and passive impingement-provoking postures

2021 ◽  
Vol 2 (11) ◽  
pp. 988-996
Author(s):  
Maryam Mohtajeb ◽  
Jolanda Cibere ◽  
Michelle Mony ◽  
Honglin Zhang ◽  
Emily Sullivan ◽  
...  
Keyword(s):  
Femoral Head ◽  
Internal Rotation ◽  
Femoroacetabular Impingement ◽  
Hip Osteoarthritis ◽  
Population Based ◽  
Joint Degeneration ◽  
Open Mri ◽  
Hip Flexion ◽  
Head Neck ◽  
Acetabular Rim

Aims Cam and pincer morphologies are potential precursors to hip osteoarthritis and important contributors to non-arthritic hip pain. However, only some hips with these pathomorphologies develop symptoms and joint degeneration, and it is not clear why. Anterior impingement between the femoral head-neck contour and acetabular rim in positions of hip flexion combined with rotation is a proposed pathomechanism in these hips, but this has not been studied in active postures. Our aim was to assess the anterior impingement pathomechanism in both active and passive postures with high hip flexion that are thought to provoke impingement. Methods We recruited nine participants with cam and/or pincer morphologies and with pain, 13 participants with cam and/or pincer morphologies and without pain, and 11 controls from a population-based cohort. We scanned hips in active squatting and passive sitting flexion, adduction, and internal rotation using open MRI and quantified anterior femoroacetabular clearance using the β angle. Results In squatting, we found significantly decreased anterior femoroacetabular clearance in painful hips with cam and/or pincer morphologies (mean -11.3° (SD 19.2°)) compared to pain-free hips with cam and/or pincer morphologies (mean 8.5° (SD 14.6°); p = 0.022) and controls (mean 18.6° (SD 8.5°); p < 0.001). In sitting flexion, adduction, and internal rotation, we found significantly decreased anterior clearance in both painful (mean -15.2° (SD 15.3°); p = 0.002) and painfree hips (mean -4.7° (SD 13°); p = 0.010) with cam and/pincer morphologies compared to the controls (mean 7.1° (SD 5.9°)). Conclusion Our results support the anterior femoroacetabular impingement pathomechanism in hips with cam and/or pincer morphologies and highlight the effect of posture on this pathomechanism. Cite this article: Bone Jt Open 2021;2(11):988–996.

scholarly journals Unusual case of mixed form of femoroacetabular impingement combined with nonspecyfic synovitis of the hip joint in a young adult: A case report

2015 ◽  
Vol 72 (12) ◽  
pp. 1132-1135
Author(s):  
Marko Mladenovic ◽  
Ivan Micic ◽  
Zoran Andjelkovic ◽  
Desimir Mladenovic ◽  
Predrag Stojiljkovic
Keyword(s):  
Case Report ◽  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Unusual Case ◽  
X Rays ◽  
Mixed Form ◽  
Surgery Patient ◽  
Bone Changes ◽  
Head Neck ◽  
Neck Junction

Introduction. Minimal bone changes in the acetabulum and/or proximal femur, through mechanism known as femoroacetabular impingement, during flexion, adduction and internal rotation lead to early contact between femoral head-neck junction and acetabular brim, in anterosuperior region. Each additional pathological substrate which further decreases specified clearance provokes earlier onset of femoroacetabular impingement symptoms. Case report. We presented a 20-year-old male patient with groin pain, limping, positive impingement test, radiological signs of mixed form of femoroacetabular impingement and unrecognized chronic hypertrophic synovitis with earlier development of clinical hip symptoms than it has been expected. Open surgery of the left hip was done. Two years after the surgery, patient was asymptomatic, painless, and free of motion, with stable x-rays. Conclusion. Hypertrophic synovial tissue further reduces the distance between the femoral head-neck junction and the acetabulum, leading to the earlier onset of femoroacetabular impingement symptoms. Surgical treatment is the method of choice.

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