RESUMO
Objetivo: Definir el concepto de microhemorragia cerebral y revisar las secuencias de resonancia magnética (RM) utilizadas para su valoración. Revisar cuáles son las patologías que presentan microhemorragias y que pueden beneficiarse del uso de secuencias de susceptibilidad magnética (SWI). Conclusión: Las SWI son útiles en la detección y caracterización de microhemorragias, venas y otras fuentes de susceptibilidad. La secuencia SWI mejora la sensibilidad diagnóstica con respecto a las secuencias convencionales potenciadas en T2* (eco de gradiente T2* [2D-GRE]). Las microhemorragias cerebrales pueden asociarse a diversas enfermedades, aparecer en contextos clínicos menos conocidos o servir como biomarcador tumoral en gliomas (ITTS) y como marcador de actividad inflamatoria en las placas de esclerosis múltiple (EM).(AU)
Objectives: Define the concept of cerebral microbleeds (CMB) and describe the most useful MRI sequences for detecting this finding. Review the entities that most frequently present with CMB and that may benefit from the use of susceptibility-weighted imaging (SWI) sequences. Conclusions: SWI is a useful MRI sequence for the detection and characterization of microhemorrhages, venous structures and other sources of susceptibility in imaging. SWI is particularly sensitive to local magnetic field inhomogeneities generated by certain substances and is superior to T2* GRE sequences for this assessment. CMB may be seen in different neurologic conditions, in certain infrequent clinical contexts and have a key role as a biomarker status in gliomas (ITTS) and as a marker of inflammatory activity in multiple sclerosis.(AU)
Assuntos
Humanos , Hemorragia Cerebral Intraventricular/diagnóstico por imagem , Radiologia , Espectroscopia de Ressonância MagnéticaRESUMO
OBJECTIVES: Define the concept of cerebral microbleeds (CMBs) and describe the most useful MRI sequences for detecting this finding. Review the entities that most frequently present with CMBs and that may benefit from the use of susceptibility-weighted imaging (SWI) sequences. CONCLUSIONS: SWI is a useful MRI sequence for the detection and characterization of microhemorrhages, venous structures and other sources of susceptibility in imaging. SWI is particularly sensitive to local magnetic field inhomogeneities generated by certain substances and is superior to T2* GRE sequences for this assessment. CMBs may be seen in different neurologic conditions, in certain infrequent clinical contexts and have a key role as a biomarker status in gliomas (ITTS) and as a marker of inflammatory activity in multiple sclerosis.
Assuntos
Hemorragia Cerebral , Imageamento por Ressonância Magnética , Humanos , Hemorragia Cerebral/diagnóstico por imagem , Imageamento por Ressonância Magnética/métodosRESUMO
OBJECTIVES: Describe the radiographic features of the different forms of extrauterine leiomyomatosis. CONCLUSIONS: Leiomyomas with a rare growth pattern occur most often in women of reproductive age and with a history of hysterectomy. Extrauterine leiomyomas present a greater diagnostic challenge because they may mimic malignancies, and serious diagnostic errors may result.
Assuntos
Leiomiomatose , Neoplasias Uterinas , Feminino , Humanos , Leiomiomatose/diagnóstico por imagem , Leiomiomatose/patologia , Neoplasias Uterinas/diagnóstico por imagem , Neoplasias Uterinas/patologia , HisterectomiaRESUMO
Objetivos: Definir el concepto de leiomiomatosis extrauterina y describir sus formas de aparición. Realizar una revisión de los hallazgos radiológicos de los distintos tipos de leiomiomatosis extrauterina a partir de casos de nuestro centro. Conclusiones: La leiomiomatosis extrauterina es una entidad rara, típica de mujeres premenopáusicas histerectomizadas. Conocer los hallazgos radiológicos de esta patología permite incluirla en el diagnóstico diferencial de una masa pélvica, una enfermedad peritoneal o una invasión vascular de aspecto tumoral.(AU)
Objectives Describe the radiographic features of the different forms of extrauterine leiomyomatosis. Conclusions: Leiomyomas with a rare growth pattern occur most often in women of reproductive age and with a history of hysterectomy. Extrauterine leiomyomas present a greater diagnostic challenge because they may mimic malignancies, and serious diagnostic errors may result.(AU)
