April 25, 2006
Computed tomography and magnetic resonance imaging of unusual causes of
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
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...
Patients with chronic fatigue syndrome have reduced absolute cortical blood
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
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 11, 2006
Comparison of Six Radiographic Projections to Assess Femoral Head/Neck
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
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
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
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...