Items tagged “hip”
127 results found
Ficat and Arlet classification of avascular necrosis of femoral head
The Ficat and Arlet classification uses a combination of plain radiographs, MRI, and clinical features to stage avascular necrosis of the femoral head. Classification stage 0 plain radiograph: normal MRI: normal clinical symptoms: nil stage I plain radiograph: normal or minor osteopenia ...
Idiopathic transient osteoporosis of the hip
Idiopathic transient osteoporosis of the hip (ITOH) is a self-limiting clinical entity of unknown cause, although almost certainly a vascular basis and possible overactivity of the sympathetic system exists. There is some controversy as to whether ITOH represents a very early, reversible stage o...
Perthes disease, also known as Legg-Calvé-Perthes disease, refers to idiopathic osteonecrosis of the femoral epiphysis seen in children. It should not be confused with Perthes lesion of the shoulder. It is a diagnosis of exclusion and other causes of osteonecrosis (including sickle cell disease...
Pitt pit refers to an oval or round lucency in the anterosuperior aspect of the femoral neck, just distal to the articular surface. It represents a herniation of synovium or soft tissues into the bone through a cortical defect, hence the alternate name synovial herniation pit. They are usually a...
Shenton line is an imaginary curved line drawn along the inferior border of the superior pubic ramus (superior border of the obturator foramen) and along the inferomedial border of the neck of femur. This line should be continuous and smooth. Interruption of the Shenton line can indicate (in ...
Slipped upper femoral epiphysis
Slipped upper femoral epiphysis (SUFE), also known as a slipped capital femoral epiphysis (SCFE), is a relatively common condition affecting the physis of the proximal femur in adolescents. It is one of the commonest hip abnormalities in adolescence and is bilateral in ~20% of cases. Epidemiolo...
Ultrasound of the hip (adult)
There are several approaches to ultrasound examination of the adult hip. Anterior approach Patient positioning supine with the hip in mild external rotation Planes sagittal oblique plane parallel to the long axis of the femoral neck to assess femoral head and neck and for any joint effusio...
Graf method for ultrasound classification of developmental dysplasia of the hip
The Graf method for ultrasound classification system for developmental dysplasia of the hip (DDH) in infants, combines both alpha and beta angles. There are a number of additional subdivisions, which are often not used clinically. As a general rule, the alpha angle determines the type and in s...
Alpha angle (developmental dysplasia of the hip)
The alpha angle is a measurement used in the ultrasonographic assessment of developmental dysplasia of the hip (DDH). The angle is formed by the acetabular roof to the vertical cortex of the ilium and thus reflects the depth of the bony acetabular roof. This is a similar measurement to the acet...
Beta angle (developmental dysplasia of the hip)
The beta angle is a measurement used in the ultrasonographic assessment of developmental dysplasia of the hip (DDH). It is defined as the angle formed between the vertical cortex of the ilium and the triangular labral fibrocartilage (echogenic triangle) and thus reflects the femoral head cartil...
Pincer femoroacetabular impingement
Published 19 May 2008
The piriformis muscle is a muscle in the gluteal region of the lower limb. Summary origin: sacrum course: exits the pelvis through the greater sciatic foramen insertion: greater trochanter of the femur action: abduction and lateral rotation of the thigh arterial supply superior gluteal ar...
Acute hip arthritis
Published 26 Jan 2009
Osteoarthritis of the hip (grading)
Osteoarthritis of the hip can be graded according to severity on imaging. Conventional radiograph grading grade 0: normal grade 1: possible joint space narrowing and subtle osteophytes grade 2: definite joint space narrowing, defined osteophytes and some sclerosis, especially in the acetabul...
Legg-Calvé-Perthes disease (staging)
Staging of Legg-Calve-Perthes syndrome refers to x-ray abnormalities, and represents 4 phases of the disease: stage I: early asymmetric femoral epiphyseal size (smaller on the affected side) apparent increased density of the femoral head epiphysis widening of the medial joint space blurring...
Crescent sign of avascular necrosis
The crescent sign of avascular necrosis is seen on conventional radiographs and refers to a linear area of subchondral lucency seen most frequently in the anterolateral aspect of the proximal femoral head (which is optimally depicted on the frog-leg radiographic view). It indicates imminent arti...
Slipped capital femoral epiphysis
Published 19 Sep 2009
Gluteus medius tear
Published 23 Sep 2009
Acetabular labrum acts to deepen the acetabulum and increase contact between the pelvis and the femoral head. Its exact biomechanical role remains to be fully elucidated. Gross anatomy The acetabular labrum is a C-shaped fibrocartilaginous structure with an opening anteroinferiorly at the site...
The perilabral sulcus is a physiological space between the acetabular labrum and capsule of the hip joint, which inserts next to the base of the labrum and is therefore intra-articular. Superiorly the capsule's attachment is displaced from the labrum by a few millimeters and thus the sulcus is ...