scholarly journals A rare cause of sciatica: Sciatic nerve schwannoma

SICOT-J ◽  
2020 ◽  
Vol 6 ◽  
pp. 16
Author(s):  
Renaud Maes ◽  
Pascal Ledoux ◽  
Grégoire de Brouckere
Keyword(s):  
Magnetic Resonance Imaging ◽  
Sciatic Nerve ◽  
Clinical Presentation ◽  
Imaging Modality ◽  
Final Diagnosis ◽  
Nerve Trunk ◽  
Popliteal Fossa ◽  
Resonance Imaging ◽  
Delay In Diagnosis ◽  
Magnetic Resonance Imaging Mri

The authors report one case of schwannoma located in the sciatic nerve, just above the popliteal fossa. A sciatic localization is rare, observed in 1% of the patients. The misleading clinical presentation of this localization causes a delay in diagnosis. Magnetic Resonance Imaging (MRI) is the imaging modality of choice, but the final diagnosis is made by the histological examination of the tumor. Schwannoma should be surgically removed without division of the nerve trunk.

Reevaluating Magnetic Resonance Imaging in Radiographically Suspected Osteomyelitis of the Toe

2018 ◽  
Vol 108 (6) ◽  
pp. 472-477
Author(s):  
Nicholas Ciotola ◽  
William D. Spielfogel
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Clinical Presentation ◽  
Imaging Modality ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Additional Information ◽  
Operative Planning ◽  
Magnetic Resonance Imaging Mri ◽  
Record Review

Background: Magnetic resonance imaging (MRI) is both sensitive and specific in the diagnosis of osteomyelitis, and it is an important imaging modality in preoperative planning of resection of infected bone. In many cases, however, the extent of osseous infection is evident on plain radiographs, and little additional information is gained from the MRI. The goal of this study was to assess the accuracy of radiographs against MRIs in assessing the spread of suspected osteomyelitis from one phalanx to another or to a metatarsal. Methods: A medical record review was performed, and 14 patients with 16 toes confirmed to have osteomyelitis involving one or more phalanges were included in the study. An investigator blinded to the MRI findings interpreted the extent of osseous involvement based solely on the radiographic and clinical presentation. The accuracy of the radiographic interpretation was then calculated against the MRI findings. Results: In 14 of the 16 toes (87.5%), whether osteomyelitis had spread from one bone to another was determined based on the radiographic and clinical presentation. In one toe, the radiograph did not adequately depict osteomyelitis in adjacent infected bone. In one more toe, the radiograph depicted features of osteomyelitis in uninfected bone. Conclusions: In a large percentage of patients, the phalanges affected by osteomyelitis had visible findings on the radiograph, and operative planning could have been based on the radiograph alone.

scholarly journals Occlusal stabilization appliance: evaluation of its efficacy in the treatment of temporomandibular disorders

2004 ◽  
Vol 12 (3) ◽  
pp. 238-243 ◽  
Author(s):  
Elisa Emi Tanaka ◽  
Emiko Saito Arita ◽  
Bunji Shibayama
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Temporomandibular Joint ◽  
Temporomandibular Disorders ◽  
Imaging Modality ◽  
Clinical Status ◽  
Signs And Symptoms ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri ◽  
Mri Evaluation

Occlusal stabilization appliances or splints are the most widely employed method for treatment of temporomandibular disorders (TMD). Magnetic Resonance Imaging (MRI) is the most indicated imaging modality to evaluate the components of the temporomandibular joint (TMJ). Forty patients with signs and symptoms of temporomandibular disorders were treated with splints for a mean period of 12 months, comprising regular semimonthly follow-ups. After stabilization of the clinical status, occlusal adjustments and MRI evaluation were performed. It was concluded that the success of this kind of treatment are related to the total (70%) or partial improvement (22.5%) of painful symptomatology and to the functional reestablishment of the craniomandibular complex. The MRI allowed evaluation and also the conclusion that the splints provide conditions for the organism to develop means to resist to the temporomandibular disorders by means of elimination of several etiologic factors. Moreover, after treatment the patients are able to cope with disc displacements with larger or smaller tolerance.

scholarly journals Carcinomatous encephalitis as clinical presentation of occult lung adenocarcinoma: case report

2007 ◽  
Vol 65 (3b) ◽  
pp. 841-844 ◽  
Author(s):  
Henrique Barbosa Ribeiro ◽  
Tadeu Ferreira de Paiva Jr ◽  
Gustavo Pignatari Rosas Mamprin ◽  
Milton Luiz Gorzoni ◽  
Antônio José da Rocha ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Clinical Presentation ◽  
Clinical Manifestations ◽  
Mass Effect ◽  
Pulmonary Adenocarcinoma ◽  
Rare Entity ◽  
Resonance Imaging ◽  
Clinical Imaging ◽  
Magnetic Resonance Imaging Mri

Carcinomatous encephalitis is a rare entity, originally described by Madow and Alpers in 1951, which is characterized by tumoral spreading perivascular, without mass effect. Clinical manifestations such as hemiparesis, seizures, ataxia, speech difficulties, cerebrospinal fluid findings as well as computed tomography are nonspecific. This leads the physician to pursue more frequent diseases that could explain those manifestations - toxic, metabolic, and/or infectious encephalopathy. A magnetic resonance imaging (MRI) with gadolinium, the method of choice, presumes the diagnosis. Previous reports of this unusual form of metastatic disease have described patients with prior diagnosis of pulmonary adenocarcinoma. We present the case of carcinomatous encephalitis in a 76-years-old woman as the primary manifestation of occult pulmonary adenocarcinoma with its clinical, imaging, and anatomopathological findings.

scholarly journals Metal-Based Complexes as Pharmaceuticals for Molecular Imaging of the Liver

2019 ◽  
Vol 12 (3) ◽  
pp. 137 ◽  
Author(s):  
Julia Greiser ◽  
Wolfgang Weigand ◽  
Martin Freesmeyer
Keyword(s):  
Magnetic Resonance Imaging ◽  
Positron Emission Tomography ◽  
Metal Complexes ◽  
Imaging Technique ◽  
Imaging Modality ◽  
Emission Tomography ◽  
Resonance Imaging ◽  
Positron Emission ◽  
Magnetic Resonance Imaging Mri ◽  
Uptake Mechanisms

This article reviews the use of metal complexes as contrast agents (CA) and radiopharmaceuticals for the anatomical and functional imaging of the liver. The main focus was on two established imaging modalities: magnetic resonance imaging (MRI) and nuclear medicine, the latter including scintigraphy and positron emission tomography (PET). The review provides an overview on approved pharmaceuticals like Gd-based CA and 99mTc-based radiometal complexes, and also on novel agents such as 68Ga-based PET tracers. Metal complexes are presented by their imaging modality, with subsections focusing on their structure and mode of action. Uptake mechanisms, metabolism, and specificity are presented, in context with advantages and limitations of the diagnostic application and taking into account the respective imaging technique.

Comparison of spinal magnetic resonance imaging and myelography in cancer patients.

1987 ◽  
Vol 5 (10) ◽  
pp. 1663-1669 ◽  
Author(s):  
C Hagenau ◽  
W Grosh ◽  
M Currie ◽  
R G Wiley
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Cancer Patients ◽  
Imaging Modality ◽  
Radicular Pain ◽  
Surface Coil ◽  
Resonance Imaging ◽  
Spinal Magnetic Resonance Imaging ◽  
Clinically Significant ◽  
Magnetic Resonance Imaging Mri

Spinal involvement by systemic malignancy is common, and often leads to extradural compression of the spinal cord and/or nerve roots by metastases. Rapid, anatomically accurate diagnosis is essential to the successful management of these patients. We compared spinal magnetic resonance imaging (MRI) with conventional myelography in a series of 31 cancer patients being evaluated for myelopathy (N = 10), or back/radicular pain (N = 21). All patients were evaluated between April 1985 and July 1986, and underwent both studies within ten days of each other (median, two days). MRI was performed on a 0.5 Tesla Technicare unit with a body surface coil, and results compared with standard contrast myelography. All studies were reviewed separately and in a "blinded" fashion. MRI and myelography were comparable in detecting large lesions that produced complete subarachnoid block (five of ten patients with myelopathy, three of twenty-one patients with back/radicular pain). In 19 of 31 patients, smaller but clinically significant extradural lesions were found. In nine of 19 cases, these lesions were demonstrated equally well by both modalities; in nine of 19 cases, these lesions were demonstrated by myelography alone; in one of 19, a lesion was demonstrated by MRI alone. Given our current technology, myelography appeared superior to MRI as a single imaging modality. However, MRI may be an alternative in patients where total myelography is technically impossible or unusually hazardous.

scholarly journals Sensitivity of Magnetic Resonance Imaging in the Detection of Colorectal Liver Metastases

2008 ◽  
Vol 90 (1) ◽  
pp. 25-28 ◽  
Author(s):  
S Blyth ◽  
A Blakeborough ◽  
M Peterson ◽  
IC Cameron ◽  
AW Majeed
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Liver Metastases ◽  
Colorectal Liver Metastases ◽  
Imaging Modality ◽  
Invasive Technique ◽  
Resonance Imaging ◽  
Mri Scans ◽  
Magnetic Resonance Imaging Mri ◽  
High Degree

INTRODUCTION The aim of this study was to evaluate the sensitivity of magnetic resonance imaging (MRI) in the detection of colorectal liver metastases. PATIENTS AND METHODS Pre-operative MRI scanning of the liver was performed by a single radiologist and the size and number of definite liver metastases were recorded. Patients then underwent hepatectomy with routine intra-operative ultrasonography (IOUS) and resected specimens were sent for histopathology. Pathology findings were compared with those of MRI scans to determine the sensitivity of this imaging modality. Exclusions were patients undergoing hepatic resection more than 4 weeks after the MRI scan, those undergoing chemotherapy at the time of the scan, and those with conglomerate unilobar metastases. RESULTS Complete data were available for 84 patients. There was total agreement between MRI, IOUS and histology in 79 patients (101 metastases). MRI missed 5 metastases in 5 patients that were found on IOUS (or palpation of superficial lesions) and subsequently confirmed by histological examination. These measured 5 mm or less (4 patients) and 7 mm (one patient). The sensitivity of MRI in the detection of colorectal liver metastases was thus 94% for all lesions and 100% for lesions 1 cm or larger in diameter. CONCLUSIONS MRI of the liver is a non-invasive technique with an extremely high degree of sensitivity in the detection of colorectal liver metastases and should be considered as the ‘gold standard’ in the pre-operative imaging of these patients.

Endometriosis of the sciatic nerve with cyclic sciatica

2014 ◽  
Vol 21 (3) ◽  
pp. 99-102 ◽  
Author(s):  
Ozdil Baskan ◽  
Ferda Ozdemir
Keyword(s):  
Magnetic Resonance Imaging ◽  
Sciatic Nerve ◽  
Soft Tissues ◽  
Uterine Cavity ◽  
Common Disease ◽  
Resonance Imaging ◽  
Irreversible Damage ◽  
Rare Manifestation ◽  
Magnetic Resonance Imaging Mri ◽  
Gynecological Disorder

Endometriosis is an important gynecological disorder which is characterized by proliferation of the functional endometrial tissue outside the uterine cavity, affects most commonly the ovaries and less frequently the gastrointestinal tract, chest, urinary tract, and soft tissues. Endometriosis invading the sciatic nerve is a rare manifestation of a common disease. The cyclic rhythm of pain, associated with the magnetic resonance imaging (MRI) signal of the lesion should suggest a diagnosis of endometriosis. Early diagnosis and treatment are important to prevent irreversible damage to the sciatic nerve.

scholarly journals Procedural Sedation of Preterm Neonate with Frequent Apnea during Magnetic Resonance Imaging: A Case Report

2021 ◽  
Vol 27 (2) ◽  
pp. 88-90
Author(s):  
Jaewoong Jung ◽  
Juhui Park ◽  
Yang Hoon Chung ◽  
Won Seok Chae
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Preterm Infants ◽  
Preterm Neonate ◽  
Imaging Modality ◽  
Resonance Imaging ◽  
Older Children ◽  
History Of ◽  
Magnetic Resonance Imaging Mri ◽  
Careful Assessment

Magnetic resonance imaging (MRI) is a useful and safe imaging modality for examining preterm infants. However, MRI examination requires careful precautions, and infants and children are likely to require deep sedation or anesthesia to keep them still during the examination. Sedation has various risks and the greatest concern of sedation is cardiorespiratory events. In addition, delicate titration is also necessary for preterm infants because propofol pharmacokinetics is different from those in older children. We successfully completed sedation of a preterm neonate (gestational age, 32+1 weeks; birth weight, 1,970 g) with a history of frequent apnea through careful assessment and continuous monitoring. We want to suggest alternative options for airway management of the high risk of respiratory complications.

scholarly journals Recent Advances in Lanthanide Based Nano-Architectures as Probes for Ultra High-Field Magnetic Resonance Imaging

2020 ◽  
Vol 27 (3) ◽  
pp. 352-361 ◽  
Author(s):  
Silvanose Biju ◽  
Tatjana N. Parac-Vogt
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Field ◽  
Imaging Modality ◽  
Short Review ◽  
Mri Contrast Agents ◽  
Lanthanide Ions ◽  
Resonance Imaging ◽  
Multiple Imaging ◽  
Magnetic Resonance Imaging Mri

Paramagnetic Lanthanide ions incorporated into nano- architectures are emerging as a versatile platform for Magnetic Resonance Imaging (MRI) contrast agents due to their strong contrast enhancement effects combined with the platform capability to include multiple imaging modalities. This short review examines the application of lanthanide based nanoarchitectures (nanoparticles and nano- assemblies) in the development of multifunctional probes for single and multimodal imaging involving high field MRI as one imaging modality.

Progressive Quadriplegia

2016 ◽  
Author(s):  
Ji Y. Chong ◽  
Michael P. Lerario
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Clinical Presentation ◽  
Vascular Malformations ◽  
Spinal Cord Ischemia ◽  
Rare Entity ◽  
Resonance Imaging ◽  
Anterior Spinal Artery Syndrome ◽  
Magnetic Resonance Imaging Mri ◽  
Aortic Dissections

Spinal cord ischemia most often presents as an anterior spinal artery syndrome and involves watershed regions of the spinal cord. The clinical presentation and etiologies can be heterogeneous, but cord infarcts are typically the result of aortic surgeries, systemic hypotension, vertebral artery and aortic dissections, embolus, or vascular malformations. Given that it is a rare entity, involving symptoms that can progress over minutes to hours, a diagnosis is often delayed until after conventional windows for revascularization, including thrombolysis, have passed. Magnetic resonance imaging (MRI) is usually required to confirm the diagnosis.

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