Your browser doesn't support javascript.
loading
節目: 20 | 50 | 100
结果 1 - 13 de 13
过滤器
1.
Radiol. bras ; Radiol. bras;56(4): 195-201, 2023. tab, graf
文章 在 英语 | LILACS-Express | LILACS | ID: biblio-1514659

摘要

Abstract Objective: To describe the clinical and radiological evolution of lesions during and after treatment in patients diagnosed with neuroparacoccidioidomycosis (NPCM). Materials and Methods: This was a retrospective study of the medical records, computed tomography scans, and magnetic resonance imaging (MRI) scans of patients with NPCM treated between September 2013 and January 2022. Results: Of 36 cases of NPCM, eight were included in the study. One patient presented only with pachymeningeal and skull involvement, and seven presented with pseudotumors in the brain. Collectively, the eight patients presented with 52 lesions, of which 46 (88.5%) were supratentorial. There were 32 lesions with a diameter ≤ 1.2 cm, of which 27 (84.4%) disappeared during the treatment. In three cases, there were lesions > 1.2 cm that showed a characteristic pattern of evolution on MRI: an eccentric gadolinium contrast-enhanced nodule, with a subsequent decreased in the size and degree of contrast enhancement of the lesions. Conclusion: In NPCM, supratentorial lesions seem to predominate. Lesions ≤ 1.2 cm tend to disappear completely during treatment. Lesions > 1.2 cm tend to present with a similar pattern, designated the "Star of Bethlehem sign", throughout treatment.


Resumo Objetivo: Descrever a evolução clínica e radiológica das lesões durante e após o tratamento de pacientes diagnosticados com neuroparacoccidioidomicose (NPCM). Materiais e Métodos: Revisamos os prontuários médicos, estudos de tomografia computadorizada e ressonância magnética (RM) de pacientes com NPCM de nossa instituição, no período de setembro de 2013 a janeiro de 2022. Resultados: Dos 36 casos de NPCM, oito foram incluídos no presente estudo. Um caso apresentava apenas envolvimento paquimeníngeo e ósseo craniano e sete casos apresentavam lesões encefálicas pseudotumorais, totalizando 52 lesões, sendo 46 (88,5%) supratentoriais. Dentre 32 lesões com diâmetro ≤ 1,2 cm, 27 (84,4%) apresentaram resolução completa durante o tratamento. Três casos apresentaram padrão semelhante de evolução da lesão na RM em lesões > 1,2 cm, caracterizado pelo aparecimento de nódulo excêntrico com impregnação pelo gadolínio, seguido de redução das dimensões e do realce nodular pelo contraste nos estudos subsequentes. Conclusão: A NPCM apresenta-se predominantemente com lesões supratentoriais. Lesões ≤ 1,2 cm tendem a desaparecer completamente durante o tratamento. Lesões > 1,2 cm tendem a apresentar um padrão de imagem de RM característico ao longo do tratamento, descrito como o "sinal da Estrela de Belém".

2.
Arq. bras. neurocir ; 42(1): 8-13, 2023.
文章 在 英语 | LILACS-Express | LILACS | ID: biblio-1570196

摘要

An artifact is a feature present in an image which is not part of the original structure. It can occur as a consequence of several factors. It may be mistaken for pathologic conditions, leading to adverse consequences for the patients. The aim of the present study is to present a selection of the main artifacts described in brain and spinal magnetic resonance images to improve the ability of the physicians to recognize them and to reduce their interference on the final interpretation of a scan. The authors searched the scientific community for artifacts in magnetic resonance imaging (MRI), which were selected to focus on central nervous system (CNS) findings. With the Picture Archiving and Communication System (PACS) database from the center where this study was conducted, the authors designated brain and spine MRI scans with conspicuous artifacts to compose the present study. The artifacts were then classified as those that contribute to the diagnosis and those that must be distinguished from pathologic lesions. Considering the novel classification proposed by the present study, physicians might be stimulated to reevaluate their opinions regarding artifacts, perhaps considering them helpful to evaluate certain conditions even if they cannot be fully corrected, as shown by this distinct approach to artifacts with specific findings concerning differential diagnosis of CNS conditions.


Um artefato está em uma imagem, mas não faz parte da estrutura original. Ele pode ocorrer como consequência de uma miríade de fatores e pode ser confundido com condições patológicas, levando a consequências adversas para os pacientes. O objetivo do presente estudo é apresentar uma seleção dos principais artefatos descritos em imagens de ressonância magnética (RM) cerebral e da coluna vertebral, a fim de melhorar a capacidade dos médicos de reconhecê-los e reduzir sua interferência na interpretação final. Os autores pesquisaram na literatura por artefatos em imagens de RM, os quais foram selecionados para se concentrar nos achados do sistema nervoso central (SNC). Com o banco de dados Picture Archiving and Communication System (PACS) do centro onde o presente estudo foi realizado, os autores separaram exames de RM do cérebro e da coluna com artefatos conspícuos para compor o presente estudo. Os artefatos foram então classificados como aqueles que contribuem para o diagnóstico e os que devem ser diferenciados de lesões patológicas. Considerando esta classificação proposta, os médicos podem ser estimulados a reavaliar suas opiniões a partir de artefatos, e estes podem ser úteis para avaliar certas condições, mesmo que não possam ser totalmente corrigidas, como mostrado por esta abordagem distinta para artefatos com achados específicos relativos ao diagnóstico diferencial de condições do SNC.

3.
Arq. neuropsiquiatr ; Arq. neuropsiquiatr;80(5): 490-496, May 2022. tab, graf
文章 在 英语 | LILACS-Express | LILACS | ID: biblio-1383871

摘要

ABSTRACT Background: A variety of neurological manifestations have been attributed to COVID-19. Objective: To investigate the occurrence of neurological symptoms and neuroimaging findings in patients hospitalized in two Brazilian reference centers. Methods: We performed a retrospective cohort study of patients who had laboratory-confirmed COVID-19 presenting in two hospitals in Brazil between March 4 and July 7, 2020, who underwent brain imaging. Results: We recorded 1,359 patients with laboratory-confirmed COVID-19. Brain imaging was performed in 250 (18.4%) patients with neurological symptoms, and nine of them (3.6%) had acute or subacute ischemic stroke neuroimaging findings. Six of the nine patients initially presented with respiratory symptoms while the other three patients presented to the emergency room with acute stroke signs. Conclusions: We described the neuroimaging findings of patients infected with COVID-19 who presented with neurological symptoms in two major hospitals in Brazil. We reinforce the importance of being aware of cerebrovascular complications, both in severe hospitalized patients and in patients who present to the emergency room with acute neurological symptoms, even in the elderly.


RESUMO Introdução: Diversas manifestações neurológicas têm sido atribuídas à COVID-19. Objetivo: Investigar a ocorrência de sintomas neurológicos e achados de neuroimagem em pacientes internados em dois centros de referência brasileiros. Métodos: Estudo retrospectivo que avaliou pacientes internados em dois hospitais no Brasil entre 4 de março e 7 de julho de 2020, com confirmação laboratorial de infecção pelo COVID-19 e que foram submetidos a tomografia computadorizada ou ressonância magnética do crânio em razão de sintomas neurológicos. Resultados: Obtivemos 1.359 pacientes com confirmação laboratorial de infecção pelo COVID-19. Deles, 250 (18,4%) apresentaram sintomas neurológicos e foram submetidos a exames de imagem do crânio e nove (3,6%) demonstraram achados de neuroimagem compatíveis com acidente vascular cerebral (AVC) isquêmico agudo ou subagudo. Em seis dos nove pacientes, observaram-se inicialmente tosse e dispneia graves, enquanto outros três chegaram ao pronto-socorro com sinais de AVC agudo. Conclusões: Foram descritos os achados de neuroimagem em pacientes infectados com COVID-19 em dois grandes centros de referência brasileiros. Reforçamos a importância de estar atento aos quadros neurológicos, especialmente de AVC, tanto em pacientes graves hospitalizados quanto em pacientes que chegam ao pronto-socorro com sintomas neurológicos agudos, mesmo em idosos.

5.
Rev. Assoc. Med. Bras. (1992, Impr.) ; Rev. Assoc. Med. Bras. (1992, Impr.);67(10): 1409-1414, Oct. 2021. tab, graf
文章 在 英语 | LILACS | ID: biblio-1351436

摘要

SUMMARY OBJECTIVE: The aim of this study was to describe chest computed tomography image findings in patients with COVID-19. METHODS: The chest computed tomography scans of 453 hospitalized patients with confirmed COVID-19 were collected at two tertiary care Brazilian hospitals. Demographics and clinical data were extracted from the electronic record medical system. RESULTS: The main chest computed tomography findings were ground-glass opacities (92.5%), consolidation (79.2%), crazy-paving pattern (23.9%), parenchymal bands (50%), septal thickening (43.5%), and inverted halo sign (3.5%). Of the 453 hospitalized patients, 136 (30%) died. In this group, ground-glass opacities (94.1%), consolidation (89.7%), septal thickening (58.1%), crazy-paving pattern (52.2%), and parenchymal bands (39.7%) were the most common imaging findings. CONCLUSIONS: In a dynamic disease with a broad clinical spectrum such as COVID-19, radiologists can cooperate in a better patient management. On wisely indicated chest computed tomography scans, the fast identification of poor prognosis findings could advise patient management through hospital care facilities and clinical team decisions.


Subject(s)
Humans , COVID-19 , Thorax , Brazil , Tomography, X-Ray Computed , SARS-CoV-2 , Lung/diagnostic imaging
7.
Radiol. bras ; Radiol. bras;53(2): 129-136, Mar.-Apr. 2020. tab, graf
文章 在 英语 | LILACS-Express | LILACS | ID: biblio-1098565

摘要

Abstract Various neuropathologies produce hyperintense signals on T2-weighted or fluid-attenuated inversion recovery sequences of the temporal lobes. Recognition of the distribution pattern and associated findings may narrow the spectrum of differential diagnoses or suggest a specific disease. This pictorial essay aims to illustrate the relatively common diseases that affect the temporal lobe, such as herpes simplex encephalitis, neurosyphilis, limbic encephalitis, postictal edema, neoplasia, and multiple sclerosis, as well as those that are less common, such as myotonic dystrophy type 1, CADASIL, and CARASIL, together with the particularities of each entity.


Resumo Diversas neuropatologias apresentam hipersinal em T2 ou FLAIR nos lobos temporais, porém, o reconhecimento do padrão de distribuição e achados associados podem estreitar o espectro de diagnósticos diferenciais ou sugerir uma doença específica. Este ensaio iconográfico visa demonstrar doenças que acometem o lobo temporal e que são relativamente comuns no dia-a-dia dos radiologistas, como encefalite herpética, neurossífilis, encefalite límbica, edema pós-crise convulsiva, glioma e esclerose múltipla, e outras nem tão comuns como distrofia miotônica tipo I, CADASIL e CARASIL, atentando para as particularidades de cada entidade que auxiliam no diagnóstico.

12.
Arq. neuropsiquiatr ; Arq. neuropsiquiatr;71(10): 791-797, out. 2013. tab, graf
文章 在 英语 | LILACS | ID: lil-689790

摘要

Intracerebral hemorrhage (ICH) causes high rates of disability and neurological sequelae Objective To evaluate spot signs as predictors of expansion and worse prognosis in non-traumatic ICH in a Brazilian cohort. Method We used multidetector computed tomography angiography to study 65 consecutive patients (40 men, 61.5%), with ages varying from 33 to 89 years (median age 55 years). Clinical and imaging findings were correlated with the findings based on the initial imaging. Results Of the individuals who presented a spot sign, 73.7% died (in-hospital mortality), whereas in the absence of a spot sign the mortality rate was 43.0%. Although expansion of ICH was detected in 75% of the patients with a spot sign, expansion was observed in only 9.0% of the patients who did not present a spot sign. Conclusions The spot sign strongly predicted expansion in non-traumatic ICH and an increased risk of in-hospital mortality. .


A hemorragia intraparenquimatosa cerebral (HIC) apresenta altas taxas de incapacidade e sequela neurológica. Objetivo Avaliar a presença de spot sign como preditor de expansão e pior prognóstico no follow-up de HIC não-traumática em brasileiros. Método Usamos a ângio-tomografia para estudar prospectivamente 65 pacientes consecutivos (40 homens 61,5%), com idades variando de 33 a 89 anos (mediana 55 anos). Evolução clínica e achados de imagem foram correlacionados com a interpretação dos achados do exame inicial. Resultados 73,7% dos indivíduos com spot sign no estudo tomográfico inicial evoluíram para óbito e, na sua ausência, a taxa de mortalidade foi 43,0%. Enquanto a expansão da HIC foi detectada em 75% dos pacientes com spot sign, ela foi notada em 9% daqueles sem este sinal. Conclusão O spot sign mostrou-se forte preditor de expansão da HIC não traumática e representa maior risco de morte hospitalar nesta coorte de pacientes. .


Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Cerebral Hemorrhage , Extravasation of Diagnostic and Therapeutic Materials , Cerebral Angiography/methods , Cerebral Hemorrhage/mortality , Extravasation of Diagnostic and Therapeutic Materials/complications , Hospital Mortality , Multidetector Computed Tomography/methods , Predictive Value of Tests , Prognosis , Reference Values , Risk Factors , Sensitivity and Specificity , Statistics, Nonparametric , Time Factors
搜索明细