RESUMO
Gas production as a part of disk degeneration can occur but rarely causes nerve compression syndromes. Few cases have been reported in which lumbar intraspinal epidural gas cause nerve root compression symptoms. We present 12 cases of gas collection in the spinal canal that were presented to the orthopaedic out-patient department with symptoms of low back pain and sciatica. CT showed the presence of free epidural gas collections adjacent to or over the affected nerve roots. Relief of symptoms was noted with the change of positions, lying down or sleeping. In this study, we conclude that the presence of lumbar intraspinal epidural gas that causes radicular compressing phenomena, can be easily detected with the use of CT.
Assuntos
Gases , Deslocamento do Disco Intervertebral/diagnóstico , Disco Intervertebral/diagnóstico por imagem , Canal Medular/diagnóstico por imagem , Tomografia Computadorizada por Raios X/métodos , Adulto , Idoso , Espaço Epidural/diagnóstico por imagem , Feminino , Humanos , Dor Lombar/etiologia , Masculino , Pessoa de Meia-Idade , Síndromes de Compressão Nervosa/etiologia , Ciática/etiologia , Índice de Gravidade de Doença , Inquéritos e QuestionáriosRESUMO
Twenty-three patients with an arachnoid cyst in the frontal part of the temporal bone, which produced exopthtalmos, were evaluated with CT and MRI. The majority of the patients had the peak of the bowing of the bony orbit wall in the posterior third (20/23) and only three in the middle. Arachnoid cyst are classified as small (13/23), medium (5/23) or large (5/20) size. Exopthtalmos are also classified as mild, moderate or large. CT and MRI clearly revealed the exopthtalmos, the bone remodelling process and the relationship of the orbit muscles, optic nerve and posterior bony wall of the orbit.