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Search Results: 1 - 10 of 14866 matches for " Marcel;Nogueira-Barbosa "
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Complica??es do uso intravenoso de agentes de contraste à base de gadolínio para ressonancia magnética
Elias Junior, Jorge;Santos, Antonio Carlos dos;Koenigkam-Santos, Marcel;Nogueira-Barbosa, Marcello Henrique;Muglia, Valdair Francisco;
Radiologia Brasileira , 2008, DOI: 10.1590/S0100-39842008000400013
Abstract: gadolinium-based contrast agents are much safer than the iodinated ones; however complications may occur and should be recognized for appropriate orientation and management. the total incidence of adverse reactions to contrast agents in magnetic resonance imaging ranges between 2% and 4%. cases of severe acute reactions to gadolinium, such as laryngospasm and anaphylactic shock, are rare. chronic complications secondary to the use of gadolinium also can occur and, recently an association between its use and a rare dermatologic disease occurring in patients with renal failure has been reported. nephrogenic systemic fibrosis was the subject of an official health notification issued by the american food and drug administration. this progressive disease is characterized by hardened skin with fibrotic nodules and plaques which may involve other parts of the body. patients who have been affected by this disorder presented chronic renal failure, with metabolic acidosis and had been submitted to magnetic resonance angiography, probably involving exposure to large amounts of intravenous paramagnetic contrast. this review is aimed at presenting a succinct description of the gadolinium-based contrast agent types, possible secondary complications, their preventive measures and management.
Ressonancia magnética na artrite reumatoide Magnetic resonance imaging in rheumatoid arthritis
Marcello H Nogueira-Barbosa
Revista Brasileira de Reumatologia , 2011, DOI: 10.1590/s0482-50042011000600001
Abstract:
Apresenta??es incomuns no diagnóstico por imagem do pseudotumor intraósseo do hemofílico
Santos, Marcel Koenigkam;Polezi, Mariana Basso;Engel, Edgard Eduard;Pastorello, M?nica Tempest;Sim?o, Marcelo Novelino;Elias Junior, Jorge;Nogueira-Barbosa, Marcello Henrique;
Radiologia Brasileira , 2009, DOI: 10.1590/S0100-39842009000300008
Abstract: objective: the present study was aimed at describing uncommon presentations of intraosseous hemophilic pseudotumor in imaging diagnosis. materials and methods: retrospective study evaluating five hemophilic pseudotumors in bones of two patients with hemophilia a. imaging findings were consensually evaluated by two musculoskeletal radiologists. plain radiography, computed tomography and magnetic resonance imaging studies were analyzed. results: at contrast-enhanced computed tomography images, one of the lesions on the left thigh was visualized with heterogeneously enhanced solid areas. this finding was later confirmed by anatomopathological study. another uncommon finding was the identification of a healthy bone portion interposed between two intraosseous pseudotumors in the humerus. and, finally, a femoral pseudotumor with extension towards soft tissues and transarticular extension, and consequential tibial and patellar involvement. conclusion: the above described imaging findings are not frequently reported in cases of intraosseous pseudotumors in hemophilic patients. it is important that radiologists be aware of these more uncommon presentations of intraosseous pseudotumors.
Ressalto no canto posteromedial do joelho relacionado ao músculo sartório
Nogueira-Barbosa, Marcello Henrique;Lacerda, Flávio de Moura;
Radiologia Brasileira , 2011, DOI: 10.1590/S0100-39842011000300015
Abstract: the most frequently reported causes of snapping knee syndrome are related to abnormalities of the meniscus, biceps femoris tendon, gracilis and semitendinosus tendons. the present report describes a case of snapping in the posterior-medial corner of the knee related to the myotendinous junction of the sartorius muscle in a 58-year-old male patient with knee hyperextension.
Ressonancia magnética na avalia??o das varia??es anat?micas meniscais e da anatomia ligamentar perimeniscal: potenciais causas de erro de interpreta??o
Sim?o, Marcelo Novelino;Nogueira-Barbosa, Marcello Henrique;
Radiologia Brasileira , 2011, DOI: 10.1590/S0100-39842011000200012
Abstract: the knowledge of meniscal anatomic variants and of the normal perimeniscal structures is essential to understand magnetic resonance imaging studies of the knee, both for the diagnosis of meniscal lesions and to avoid potential interpretation pitfalls. the present article reviews anatomic variants that change the size, shape and stability of the menisci, including the different types of discoid menisci, other less frequent meniscal malformations and the meniscal ossicle. additionally, the anatomy of perimeniscal structures, particularly those including the meniscocapsular, intermeniscal, meniscofemoral ligaments and other menisco-ligamentous structures is reviewed.
Uso de agulha de grosso calibre na sec??o percutanea do tend?o calcaneo no pé torto congênito
Maranho, Daniel Augusto Carvalho;Nogueira-Barbosa, Marcello Henrique;Sim?o, Marcelo Novelino;Volpon, José Batista;
Acta Ortopédica Brasileira , 2010, DOI: 10.1590/S1413-78522010000500006
Abstract: objective: to evaluate the percutaneous achilles tendon sectioning technique using a large gauge needle for the correction of residual equinus of congenital clubfoot treated by the ponseti method. methods: fifty-seven achilles tendon sections were prospectively evaluated in thirty-nine patients with clubfoot, treated by the ponseti method between july 2005 and december 2008. the tenotomy was performed percutaneously with a large gauge needle. ultrasound scan was performed immediately after the section, to ascertain whether the tenotomy was complete, as well as stump separation. results: there was complete tendon section in all cases, but the need to perform the section maneuver more than once was common, due to the persistence of the residual strands between tendon stumps. the thompson test and dynamic ultrasound evaluation were able to detect incomplete tenotomies. the mean ultrasound measurement of the tendon gap was 5.70 ± 2.23 mm. two patients had abnormal bleeding, which was controlled by digital pressure and did not compromise foot perfusion. conclusion: percutaneous achilles tendon sectioning with a needle proved to be efficient and safe to correct residual equinus of clubfoot treated by the ponseti technique.
Diagnostic imaging of shoulder rotator cuff lesions
Nogueira-Barbosa, Marcello Henrique;Volpon, José Batista;Elias Jr, Jorge;Muccillo, Gerson;
Acta Ortopédica Brasileira , 2002, DOI: 10.1590/S1413-78522002000400005
Abstract: shoulder rotator cuff tendon tears were evaluated with ultrasonography (us) and magnetic resonance imaging (mri). surgical or arthroscopical correlation were available in 25 cases. overall costs were also considered. shoulder impingement syndrome diagnosis was done on a clinical basis. surgery or arthroscopy was considered when conservative treatment failure for 6 months, or when rotator cuff repair was indicated. ultrasound was performed in 22 patients and mri in 17 of the 25 patients. sensitivity, specificity and accuracy were 80%, 100% and 90.9% for us and 90%, 100% and 94.12% for mri, respectively. in 16 cases both us and mri were obtained and in this subgroup statistical correlation was excellent (p< 0.001). we concluded that both methods are reliable for rotator cuff full thickness tear evaluation. since us is less expensive, it could be considered as the screening method when rotator cuff integrity is the main question, and when well trained radiologists and high resolution equipment are available.
CT-guided percutaneous drilling is a safe and reliable method of treating osteoid osteomas
Edgard Eduard Engel, Nelson Fabrício Gava, Marcello Henrique Nogueira-Barbosa and Filipe Almeida Botter
SpringerPlus , 2013, DOI: 10.1186/2193-1801-2-34
Abstract: Our case series suggests that this method is reliable and safe. The level of complexity is comparable with other minimally invasive percutaneous procedures. The cost is low because there is no need to buy probes or other equipment. The negative points include weakening of the bone and the logistical problem of assembling the orthopedic surgeon, radiologist, and anesthesiologist in the tomography room.
Diagnostic imaging of shoulder rotator cuff lesions
Nogueira-Barbosa Marcello Henrique,Volpon José Batista,Elias Jr Jorge,Muccillo Gerson
Acta Ortopédica Brasileira , 2002,
Abstract: Shoulder rotator cuff tendon tears were evaluated with ultrasonography (US) and magnetic resonance imaging (MRI). Surgical or arthroscopical correlation were available in 25 cases. Overall costs were also considered. Shoulder impingement syndrome diagnosis was done on a clinical basis. Surgery or arthroscopy was considered when conservative treatment failure for 6 months, or when rotator cuff repair was indicated. Ultrasound was performed in 22 patients and MRI in 17 of the 25 patients. Sensitivity, specificity and accuracy were 80%, 100% and 90.9% for US and 90%, 100% and 94.12% for MRI, respectively. In 16 cases both US and MRI were obtained and in this subgroup statistical correlation was excellent (p< 0.001). We concluded that both methods are reliable for rotator cuff full thickness tear evaluation. Since US is less expensive, it could be considered as the screening method when rotator cuff integrity is the main question, and when well trained radiologists and high resolution equipment are available.
Increased vertebral morphometric fracture in patients with postsurgical hypoparathyroidism despite normal bone mineral density
Mendon?a Maira L,Pereira Francisco A,Nogueira-Barbosa Marcello H,Monsignore Lucas M
BMC Endocrine Disorders , 2013, DOI: 10.1186/1472-6823-13-1
Abstract: Background The mechanism behind parathyroid hormone (PTH) activation of bone remodeling is intimately dependent on the time of exposure of bone cells to hormone levels. Sustained high PTH levels trigger catabolism, while transitory elevations induce anabolism. The effects of hypoparathyroidism (PhPT) on bone are unknown. The objective was to study the impact of PhPT on bone mineral density (BMD), on the frequency of subclinical vertebral fracture and on mandible morphometry. Methods The study comprised thirty-three postmenopausal women, 17 controls (CG) and 16 with PhPT (PhPTG) matched for age, weight and height. Bone mineral density (BMD) of lumbar spine, total hip and 1/3 radius, radiographic evaluation of vertebral morphometry, panoramic radiography of the mandible, and biochemical evaluation of mineral metabolism and bone remodeling were evaluated in both groups. Results There were no significant differences in lumbar spine or total hip BMD between groups. There was marked heterogeneity of lumbar spine BMD in PhPTG (high = 4, normal = 9, osteopenia = 1, and osteoporosis = 2 patients). BMD was decreased in the 1/3 radius in PhPTG P < 0.005). The PhPTG group exhibited an increased frequency of morphometric vertebral fractures and decreased mandible cortical thickness. Conclusion The study suggests that vertebral fragility occurs in PhPT despite normal or even high BMD. The current results encourage further studies to evaluate the use of panoramic radiography in the identification of osteometabolic disorders, such as PhPT and the development of a more physiological treatment for PhPT.
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