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Search Results: 1 - 10 of 34203 matches for " Valdair Francisco;Nogueira-Barbosa "
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Diagnóstico por imagem nas síndromes do estalido ou do ressalto
Silva, Henrique Ribeiro da;Sim?o, Marcelo Novelino;Elias Júnior, Jorge;Muglia, Valdair Francisco;Nogueira-Barbosa, Marcello Henrique;
Radiologia Brasileira , 2009, DOI: 10.1590/S0100-39842009000100011
Abstract: snapping syndromes occur during certain movements in several joints and may be accompanied by local pain and crepitation or audible snapping sensation. snapping joints may eventually have no pathologic significance and in this case no treatment is required. there is an array of intra- and extra-articular causes of snapping syndrome and the lack of precise clinical findings impairs the definition of the most appropriate imaging method to confirm the diagnosis. the present study is aimed at discussing the most frequent causes of snapping syndrome in different joints, emphasizing the indications and limitations of each of the different diagnostic methods in specific situations of the clinical practice.
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 avalia??o das rea??es periosteais
Nogueira-Barbosa, Marcello Henrique;Sá, José Luiz de;Trad, Clóvis Sim?o;Oliveira, Rodrigo Cecílio Vieira de;Elias Júnior, Jorge;Engel, Edgard Eduard;Sim?o, Marcelo Novelino;Muglia, Valdair Francisco;
Radiologia Brasileira , 2010, DOI: 10.1590/S0100-39842010000400012
Abstract: the objective of the present essay was to encourage a careful evaluation of periosteal reactions on magnetic resonance images. the initial approach to bone lesions is made by conventional radiography and, based on the imaging findings, periosteal reactions are classified into classical subtypes. although magnetic resonance imaging is considered as the gold standard for local staging of bone tumors, the utilization of such method in the study of periosteal reactions related to focal bone lesions has been poorly emphasized, with relatively few studies approaching this subject. the literature review revealed a study describing an experimental animal model of osteomyelitis suggesting that magnetic resonance imaging is superior to other imaging methods in the early identification of periosteal reactions. another study has suggested a good correlation between conventional radiography and magnetic resonance imaging in the identification and classification of periosteal reactions in cases of osteosarcoma. the present essay illustrates cases of periosteal reactions observed at magnetic resonance imaging in correlation with findings of conventional radiography or other imaging methods.
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.
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:
Fracture of the Fabella: A Rare Injury in Knee Trauma
Andre Rodrigues Fa anha Barreto,Francisco Abaete Chagas-Neto,Michel Daoud Crema,Mario Muller Lorenzato,Mariana Tiemi Teixeira Kobayashi,Carlos Ribeiro Monteiro,Marcello Henrique Nogueira-Barbosa
Case Reports in Radiology , 2012, DOI: 10.1155/2012/390150
Abstract: We present a case of a 21-year-old woman sustaining a traumatic [fabellar] fracture following a motor vehicle accident. The fabellar fracture was confirmed on plain films, which prompted further evaluation of the knee with ultrasound and magnetic resonance imaging to evaluate other possible associated injuries. Fracture of the fabella is a rare condition. Clinically, patients present with posterolateral knee pain, edema, and limited knee extension. Occasionally these symptoms may be very subtle, delaying the correct diagnosis and patient management.
Fracture of the Fabella: A Rare Injury in Knee Trauma
Andre Rodrigues Fa?anha Barreto,Francisco Abaete Chagas-Neto,Michel Daoud Crema,Mario Muller Lorenzato,Mariana Tiemi Teixeira Kobayashi,Carlos Ribeiro Monteiro,Marcello Henrique Nogueira-Barbosa
Case Reports in Radiology , 2012, DOI: 10.1155/2012/390150
Abstract: We present a case of a 21-year-old woman sustaining a traumatic [fabellar] fracture following a motor vehicle accident. The fabellar fracture was confirmed on plain films, which prompted further evaluation of the knee with ultrasound and magnetic resonance imaging to evaluate other possible associated injuries. Fracture of the fabella is a rare condition. Clinically, patients present with posterolateral knee pain, edema, and limited knee extension. Occasionally these symptoms may be very subtle, delaying the correct diagnosis and patient management. 1. Introduction The fabella is a fibrocartilaginous or ossified sesamoid bone of the knee, classically located within the tendon of the lateral head of the gastrocnemius muscle, but may rarely be found within the medial head of that muscle [1, 2]. Its ossification pattern is endochondral, either partial or total, occurring around 12–15 years of age, later than patella’s ossification. The estimated overall prevalence varies from 10% to 30%, reaching 66% in some reported series [2, 3]. In nonpathologic conditions, bony fabellae may measure up to 15?mm [2, 3]. The fabella may be involved in a variety of pathological entities. Fabellar fracture, either secondary to direct trauma or to chronic stress, is a rare entity being frequently underdiagnosed [4–8]. 2. Case Presentation A previously healthy 21-year-old woman riding on the back seat of a vehicle with a fasten seat belt was involved in a car accident, leading to a direct left knee trauma. After initial assessment at the emergency department, she complained of diffuse left knee pain, which was aggravated by passive extension and palpation, mostly around the posterolateral corner. Anteroposterior and lateral plain films of the left knee were then taken for initial evaluation (Figure 1) and revealed a transverse radiolucent line with corrugated borders across an ossified fabella—regarded as a complete fracture—and also a small avulsion cortical fracture at the medial aspect of the medial femoral epicondyle. An ultrasound of the knee was performed to assess the superficial tendons and ligaments around the knee, especially at the posterolateral corner, as well as to confirm the presence of joint effusion. Posterolaterally, the fabella was depicted with a central cortical defect related to the fabellar fracture seen on radiographs. To further evaluate and rule out injury of the internal structures of the knee, a routine magnetic resonance imaging (MRI) of the left knee was performed. Figure 1: Lateral plain film of the left knee revealed a transverse radiolucent
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.
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