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Ultrasound Guidance for the Psoas Compartment Block:
An Imaging Study
- Anesthesia & Analgesia
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We developed
an ultrasound-guided approach to the psoas compartment at
the levels L2-3, L3-4, and L4-5. Feasibility and accuracy
were tested on embalmed cadavers and verified by means of
computed tomography. Ultrasound guidance proved to be
feasible and accurate for the performance of psoas
compartment blocks... |
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| February 22, 2002 |
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Magnetic resonance imaging of the hindfoot with
surgical correlations
- Skeletal Radiology |
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This review
aims to analyze the complex anatomy and the most frequent
pathological conditions involving the hindfoot. The
difficult surgical approach to this region makes imaging, in
particular MRI, of fundamental importance for clinicians in
order to give complete information about the bony,
ligamentous or chondral structure involved... |
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Osteoblastoma-like osteosarcoma of the distal tibia
- Skeletal Radiology |
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We report a
case of a 14-year-old boy with an intracompartmental lytic
lesion with poorly defined margins in the right distal tibia
that was originally treated with curettage and bone
grafting. Histologic examination showed an osteoblastic
tumor with unusual features, which was found on consultation
to be an osteoblastoma-like osteosarcoma, a rare, low-grade
variant of osteosarcoma. Subsequently, the patient underwent
en bloc resection of the distal tibia, which was replaced
with vascularized bone graft and followed by chemotherapy.
Two years later, he is alive with lung metastases...
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Intra-articular elastofibroma of the shoulder joint
- Skeletal Radiology |
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A 19-year-old
man presented with an elastofibroma in his left shoulder
joint. The patient had had limitation of motion in his left
arm for 3 years, especially when rotating internally.
Radiography of his left shoulder showed bone erosion in the
neck of the humerus. On MR imaging, a soft tissue mass was
noted in the shoulder joint eroding bone. The mass showed
similar signal intensity to that of surrounding muscles on
T1- and T2-weighted images. At surgery, a soft, encapsulated
mass was found attached to the subscapularis muscle. It was
pathologically confirmed as an elastofibroma. This unusual
manifestation of an elastofibroma is discussed...
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Skin metastasis from conventional giant cell tumor
of bone: conceptual significance
- Skeletal Radiology |
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A conventional
giant cell tumor of the proximal femur recurred twice
locally and developed pulmonary nodules. The lung lesions
were felt to be an example of "benign" metastases. Eight
months after the initial presentation, the patient developed
a single skin nodule on the contralateral leg. Histologic
features of the skin nodule showed conventional giant cell
tumor identical to the bone lesion. This nodule is a
manifestation of arterial metastasis typical of any
malignant tumor and seemingly contradicts the concept of
"benign " metastasis... |
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Three-dimensional techniques in orthopaedic
ultrasonography
- Der Orthopaede |
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Due to the low
differences of the acoustic impedance visualisation is
confusing in a transparency mode and needs a time consuming
postprocessing in a surface mode. Future developments
address to the field of faster acquisition ("real time 3D"),
higher geometric precision and easier visualisation by
automated segmentation. By the three-dimensionality of the
data set applications in telematics, navigation and
simulation ("sonographic training") are expected...
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Ultrasound examination of the hip. An update
- Der Orthopaede |
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Hip sonography
has continued to progress in terms of its quality and
standards. Error analyses showed that the most common
misdiagnoses are caused by the false anatomical
identification of an echo, by insufficient or missing
verification of usability, by inadequate knowledge of
exceptions as well as by defective technical equipment...
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Intraosseous vascular access defect: fracture mimic
in the skeletal survey for child abuse
- Pediatric Radiology |
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Two infants
were transferred to the emergency department for injuries
suggestive of child abuse. Skeletal surveys showed cortical
bone defects in the proximal tibiae that were initially
interpreted as healing fractures. Further investigation,
however, revealed that intraosseous (IO) vascular access
needles had been placed at these sites in both infants...
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Imaging features of iliopsoas bursitis
- European Radiology |
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The most
accurate way to assess iliopsoas bursitis is with MR
imaging; thus, it should be used for accurate therapy
planning and follow-up studies. In order to initially prove
an iliopsoas bursitis, US is the most cost-effective,
easy-to-perform and fast alternative... |
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Medial meniscocapsular separation: MR imaging
criteria and diagnostic pitfalls
- European Journal of Radiology |
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MRI signs used
in the diagnosis of meniscocapsular separation include
meniscal displacement relative to the tibia, meniscal corner
tear, perimeniscal fluid, irregular meniscal outline,
meniscofemoral and meniscotibial extension tears, and
interposition of contrast medium between the meniscus and
the MCL. Potential causes of false positive diagnosis of
meniscocapsular separation include MCL bursitis, meniscal
cyst, MCL tear, joint effusion, and perimeniscal fat...
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Collarless polished tapered stem Clinical and
radiological follow-up over 5 years
- Journal of
Arthroplasty |
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The clinical
and radiologic outcome of a cemented, polished, tapered stem
(CPT), implanted using contemporary cementing techniques in
108 consecutive operated hips in 100 patients (68 women and
32 men, aged 19 to 83 years at the time of surgery [mean, 65
years]) was assessed after >5 years. The Harris hip scores
were good or excellent in 96% of the patients... |
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| February 14, 2002 |
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Ultrasound of muscles
- European Journal of Radiology |
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Muscle
atrophy, inflammation, avulsion and tumours are also good
indications for ultrasound... |
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Ultrasound of tendons and nerves
- European Journal of Radiology |
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Overall, US is
an effective technique for imaging tendons and nerves. In
most cases, a focused US examination can be performed more
rapidly and efficiently than MR imaging... |
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Cross-sectional imaging of primary osseous
hemangiopericytoma
- European Journal of Radiology |
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Although
cross-sectional imaging findings are non-specific, they add
to the diagnosis and provide valuable information about the
extent of bone destruction and local tumor spread in
patients with primary osseous hemangiopericytoma. While CT
demonstrates the extent of bone destruction best, MRI better
visualizes medullary and soft tissue extension of the tumor.
Curvilinear signal abnormalities support the diagnosis of
hemangiopericytoma of bone. This imaging pattern is best
visualized on fat-suppressed or contrast enhanced
T1-weighted MR images... |
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Ultrasound of the joints
- European Journal of Radiology |
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The aims of
this review are twofold: firstly, to present the normal US
appearance of the joint structures that are susceptible to
US examination, including the joint surfaces, intra-articular
structures such as menisci and other fibrocartilages,
capsule and ligaments; and secondly, to show the US
appearance of the most commonly encountered joint disorders
and discuss the role of US in the imaging strategy of joint
disorders... |
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MRI of the arthritic finger joints: synovial
membrane volume determination, a manual vs a stereologic
method -
European Journal of Radiology |
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The time used
for volume determination in a patient varied from 1 to 2.5 h
by manual outlining and from 0.5 to 1 h by stereologic
determination. Stereologic volume estimation can provide
measures of synovial volumes comparable to the manual
outlining method and is less time-consuming. Stereologic
volume estimation seems to be a clinically useful method,
especially if it is integrated in the MR unit's
workstation... |
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| February 06, 2002 |
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Factors related to radiological damage in 61 Spaniards with
early rheumatoid arthritis
- Annals of Rheumatic Diseases
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Conclusions: Radiological
damage at disease onset is associated with a worse clinical presentation
and RF positivity, which are markers of poor outcome. There is a
subgroup of patients, with erosions only in their feet, whose clinical
presentation is less aggressive. To identify these cases of early
erosive RA, radiographs of the feet should be obtained routinely...
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Stress fracture of the clavicle in a young female gymnast
- British
Journal of Sports Medicine |
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This is the report of one
such fracture in a 10 year old female gymnast, who presented with a six
week history of medial clavicular pain. Radiographs and a computed
tomography scan showed an undisplaced fracture through the medial third
of the clavicle extending inferiorly to the rhomboid fossa in the
inferior aspect of the clavicle. Pathological fracture was excluded by
magnetic resonance imaging. The patient was treated conservatively and
was able to return to full training eight weeks later... |
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