April 2006 News Headlines

These are radiology news updates from other sites

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Date this page was last updated: 01/07/2007 03:02:52 PM

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April 28, 2006

Primary subcutaneous sacrococcygeal ependymoma: a case report and review of the literature
British Journal of Radiology
Extraspinal ependymomas are rare. The majority occur in the sacrococcygeal region. The subcutaneous variety accounts for approximately two thirds of cases, which are commonly misdiagnosed as a pilonidal cyst or sinus. Treatment is complete surgical resection...

Subchondral insufficiency fracture of the femoral head after total knee arthroplasty in a patient with rheumatoid arthritis
Modern Rheumatology
We report an 80-year-old woman with rheumatoid arthritis (RA) who was found to have subchondral insufficiency fracture of the right femoral head after total knee arthroplasty (TKA). Initially, plain radiographs showed no obvious changes, but magnetic resonance imaging (MRI) revealed an irregular, discontinuous, low-intensity band on T1-weighted images of the right hip...



April 27, 2006

Volumetric quantitative computed tomography of the proximal femur: relationships linking geometric and densitometric variables to bone strength. Role for compact bone
Osteoporosis International
Conclusion: The QCT-MIAF reported here provides analysis of both geometric and densitometric variables characterizing cortical and trabecular bone. Confirmation of our results in an independent sample would suggest that QCT may better explain failure load variance for cervical fracture than the gold standard DXA-provided BMD...


Physeal Widening in the Knee Due to Stress Injury in Child Athletes
American Journal of Roentgenology
Widened physes in the knees of skeletally immature child athletes have MR signal characteristics similar to the normal physis but likely are a sign of stress injury. These children should cease the offending sport and rest the knee to allow rapid healing...


April 26, 2006

Therapeutic Efficacy of Facet Joint Blocks
American Journal of Roentgenology
Facet joint blocks appear to have a beneficial medium-term effect in one third of patients with chronic lower back pain and may therefore be a reasonable adjunct to nonoperative treatment. However, outcome appears to depend on clinical, not on morphologic, imaging findings...

Alterations of the Thoracic Spine in Marfan's Syndrome
American Journal of Roentgenology
The purpose of this study was to determine if the thoracic vertebral elements are altered in patients with Marfan's syndrome...Because the phenotypic expression of Marfan's syndrome is variable, information on the spine from thoracic studies in combination with major criteria may be helpful clinically...

Percutaneous Sacroplasty: Long-Axis Injection Technique
American Journal of Roentgenology
Sacroplasty, or the injection of percutaneous polymethyl methacrylate into a sacral insufficiency fracture, has been previously described using needle placement in the short axis of the sacrum. We describe a new technique of needle placement along the long axis of the sacrum...



April 25, 2006

Computed tomography and magnetic resonance imaging of unusual causes of ankle pain
Australasian Radiology
Computed tomography and MRI are frequently utilized to evaluate ankle pain that remains unexplained by radiography. The most common causes of ankle pain are related to trauma and the imaging appearances of these entities are well established in the radiologic and orthopedic literature. A smaller percentage is comprised of non-traumatic disorders. Our goal is to emphasize the value of CT and MRI in recognition of these less common and unusual causes of ankle pain...


Medial Meniscal Tears and Spontaneous Osteonecrosis of the Knee
We report on a series of 5 patients over 60 years of age who had a symptomatic medial meniscus degenerative tear followed-up with magnetic resonance imaging (MRI) sequence without arthroscopic surgery who developed spontaneous osteonecrosis of the knee...Elderly patients with medial meniscal tears should be alerted of this potential sequence of events and the impossibility for the surgeon to predict or prevent this situation at this stage, especially before performing an arthroscopic meniscectomy...


April 24, 2006

Thoracic ventral dural defect: Idiopathic spinal cord herniation
Australasian Radiology
Thoracic ventral dural defect, and resultant idiopathic spinal cord herniation, is a rare but increasingly recognized cause of a chronic progressive thoracic myelopathy, particularly in middle-aged women. A neurosurgically confirmed case is presented, together with a review of the pathogenesis, clinical presentation, imaging features, treatment options and progress of this entity post-treatment...


April 21, 2006

Ahlback grading of osteoarthritis of the knee: Poor reproducibility and validity based on visual inspection of the joint
Acta Orthopaedica Scandinavica
The main problem with the Ahlback classification was that a joint space could often be seen radiographically despite the presence of bone attrition on the preparations. According to our study, conventional radiographs do not give sufficient information for correct grading...



April 20, 2006

The association between muscle EMG and perfusion in knee extensor muscles
Clinical Physiology and Functional Imaging
The relationships between electromyographic (EMG) activity and force as well as muscle blood flow and work have been well established. However, the association between muscle blood flow and EMG activity remains unsolved. Thus, to test the hypothesis that muscle EMG activity relates to muscle perfusion in different compartments of the quadriceps femoris (QF) muscle, 12 healthy male subjects were studied...


April 18, 2006

Retrospective diagnosis of chondrodysplasia punctata
Australasian Radiology
The diagnosis of punctate epiphyseal dysplasia (PED) after disappearance of puncta is problematical. In some instances, however, the phenotypic and radiographic characteristics may persist and permit a retrospective diagnosis of PED in persons with unclassified bone dysplasia or bone changes of unknown origin...


Patients with chronic fatigue syndrome have reduced absolute cortical blood flow
Clinical Physiology and Functional Imaging
These data indicate that patients with CFS have reduced absolute cortical blood flow in rather broad areas when compared with data from healthy controls and that those devoid of psychopathology had the most reductions in cortical flow. These data support, in part, our earlier findings that patients devoid of psychopathology are the group most at risk of having some of the symptoms of CFS due to brain dysfunction...


April 17, 2006

Primary osteosarcoma of the skull
Australasian Radiology
Primary osteogenic sarcoma of the skull is an exceedingly rare condition. An adult male patient is described, who had a painless swelling in the right forehead that had rapidly enlarged in the previous 6 months. Radiological investigations showed a large destructive mass lesion involving the right side of the frontal bone with extension into the frontal sinus, causing marked extradural compression of brain parenchyma...



April 14, 2006

Utility of screening tools for the prediction of low bone mass in African American men
Osteoporosis International
The prevalence of osteopenia and osteoporosis were unexpectedly high in outpatient African American male veterans, who are considered to be at low risk for low bone mass. Heel ultrasound was able to predict low bone mass with sufficiently high sensitivity and specificity for use as a screening tool...



April 11, 2006

Comparison of Six Radiographic Projections to Assess Femoral Head/Neck Asphericity
Clinical Orthopedics and Related Research
Early radiographic detection of femoroacetabular impingement might prevent initiation and progression of osteoarthritis. The structural abnormality in femoral-induced femoroacetabular impingement (cam type) is frequently asphericity at the anterosuperior head/neck contour...The Dunn view in 45[degrees] or 90[degrees] flexion or a cross-table projection in internal rotation best show femoral head/neck asphericity, whereas anteroposterior or externally rotated cross-table views are likely to miss asphericity...


April 7, 2006

Spinal Decompensation in Neuromuscular Disease
In this retrospective radiography study, we analyzed curve shape and direction in scoliosis secondary to neuromuscular disease...Conclusion: In neuromuscular scoliosis, curve patterns and apical levels are similar to what is seen in the most prevalent types of adolescent idiopathic scoliosis...



Musculoskeletal News


April 4, 2006

Automated Spine Survey Iterative Scan Technique
Institutional review board approval, with waived consent, was obtained to develop a spine-labeling algorithm with retrospectively obtained deidentified HIPAA-compliant data. An automated magnetic resonance (MR) imaging technique to rapidly survey the entire spine and provide definitive numbering of disks and vertebrae was compared with neuroradiologist assignments in 50 cases...


April 3, 2006

CT-Guided Core Biopsy of Subchondral Bone and Intervertebral Space in Suspected Spondylodiskitis
American Journal of Roentgenology
Our objective was to describe the various imaging patterns of Fabry disease, including cerebrovascular, renal, cardiac, and other organ involvement. Fabry disease, an X-linked inborn error of glycosphingolipid catabolism resulting from a deficient activity of the hydrolase -galactosidase A, displays more complications in men than in heterozygous women...

Dynamic Contrast-Enhanced MRI Quantification of Synovium Microcirculation in Experimental Arthritis
American Journal of Roentgenology
Specimen sonography is an effective procedure for identifying the presence of the lesion within the specimen; however, it is of limited value in cases of small hypoechoic lesions against a fatty background. Assessment of margins is limited by both false-positive and false-negative results...