RESUMO
We have described three patient who sustained trauma to their spines followed by persisting pain. Initial radiographs were negative, but on subsequent examinations compression fractures were demonstrated. This sequence of events resembles the clinical picture described by Kümmell in 1895 with significant differences. A plethora of early written description with minimal radiographic documentation suggests that this is a relatively rare condition. It is appropriate, therefore, to present these cases with the suggestion that traumatic injuries with persisting thoracic or upper lumbar back pain should be followed up radiographically in order to demonstrate the occurrence of subsequent compression fractures. These fractures may be treated with simple braces.
Assuntos
Fraturas Ósseas/diagnóstico por imagem , Traumatismos da Medula Espinal/diagnóstico por imagem , Idoso , Dor nas Costas/diagnóstico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Radiografia , Fatores de TempoRESUMO
The diagnosis of silicatosis was made by observing birefringent crystals in needle-aspiration biopsy specimens of bilateral basilar pulmonary masses in a clay worker, initially suspected of having metastatic neoplasm. Subsequently the crystals were examined by scanning electron microscopy and energy-dispersive x-ray analysis, which gave supportive evidence for their silicate composition. This experience indicates that needle-aspiration biopsy in conjunction with scanning electron microscopy and energy-dispersive x-ray analysis may be used in the diagnosis of benign pulmonary diseases, especially those of the inhalational fibrogenic variety.
Assuntos
Biópsia por Agulha , Microanálise por Sonda Eletrônica , Pneumoconiose/diagnóstico , Ácido Silícico , Dióxido de Silício , Idoso , Cristalização , Humanos , Macrófagos/patologia , Masculino , Microscopia Eletrônica de Varredura , Pneumoconiose/patologia , Raios XRESUMO
New developments in computed tomographic technology permit rapid, serial images that may yield information concerning tracer kinetics through a large tissue volume. One possible application of these developments is the derivation of local lung ventilation by observing the temporal changes of stable xenon concentrations. Preliminary results from six multilevel ventilation studies in dogs demonstrate that the lung may be repeatedly imaged during reproducible phases of respiration even when interscan table incrementation is employed to survey a number of tissue segments and breathing is permitted between scans. In addition, subanesthetic xenon concentrations provide adequate enhancement for possible quantification.