RESUMO
BACKGROUND AND PURPOSE: The incidence of cerebellar infarction in a series of patients with stroke is approximately 1.5%. The average patient age in most reported series is 62 years. The most common etiologies in this age group are atherosclerosis and cardiac embolism. The aim of this study was to determine the causes and mechanisms of cerebellar infarction in patients younger than 40 years. METHODS: We analyzed retrospectively the clinical and radiological data from 21 men and 16 women with cerebellar infarction admitted to our hospital from January 1986 to December 1996. The patients had been studied extensively to determine the etiology of the cerebellar infarction. RESULTS: In the 37 patients (mean age, 30 years), 29 infarcts were limited to one territory (15 in the posteroinferior cerebellar artery [PICA]; 14 in the superior cerebellar artery); 8 had nonterritorial infarctions. The most common stroke mechanisms in each territory were as follows: PICA: nonatherosclerotic vasculopathic (67%), cardioembolic (20%), and hematologic and cryptogenic (each 7%); superior cerebellar artery: cardioembolic (42%), cryptogenic (31%), migrainous (21%), and nonatherosclerotic vasculopathic and hematologic (each 7%); and mixed territory: nonatherosclerotic vasculopathic (50%), cryptogenic (25%), cardioembolic (12%), and hematologic (12%). CONCLUSIONS: The most common mechanism of cerebellar infarctions was arterial occlusion as a result of intracranial vertebral artery dissection (40%), mainly with PICA involvement. Embolism from a cardiac source resulted primarily from patent foramen ovale and rheumatic valvular disease. Hematologic disturbances and migraine were responsible for a few cases.
Assuntos
Doenças Cerebelares/etiologia , Doenças Cerebelares/fisiopatologia , Infarto Cerebral/etiologia , Infarto Cerebral/fisiopatologia , Adolescente , Adulto , Dissecção Aórtica/complicações , Doença das Coronárias/complicações , Embolia/complicações , Feminino , Doenças Hematológicas/complicações , Humanos , Aneurisma Intracraniano/complicações , Masculino , Transtornos de Enxaqueca/complicações , Estudos Retrospectivos , Artéria VertebralRESUMO
A new technique for the treatment of myopic astigmatism and simple myopia correction is described. The technique is based on bioengineering concepts previously studied by the authors that accurately and mathematically describe the transformation of an ellipsoidal surface (astigmatic eye) into a spheroidal one (nonastigmatic eye) by means of minimal cuts (keratotomies). The surgical procedure is described using selected cases to illustrate the alternatives the model can handle. The model itself is not presented because the calculations were done by computer.
Assuntos
Astigmatismo/cirurgia , Córnea/cirurgia , Miopia/cirurgia , Adolescente , Adulto , Feminino , Humanos , Masculino , Oftalmologia/instrumentação , Oftalmologia/métodos , Acuidade VisualRESUMO
Aunque la enfermedad de Crohn fue descrita en 1932 por el Dr. Crohn como Ileitis regional (12), hoy en dia se sabe que esta entidad puede afectar cualquier segmento del tracto gastrointestinal desde la boca hasta la región ano-rectal. En Colombia el primer caso de Enfermedad de Crohn fue publicado por el Dr. Arturo Campo Posada en 1940 (9). Se describe aquí un caso con compromiso de estómago
Assuntos
Adulto , Humanos , Feminino , Colite , Doença de Crohn , GastropatiasRESUMO
Se presentan los hallazgos clínicos, endoscópicos e histológicos de dos casos de tumor carcinoide gástrico. Endoscópicamente se encontró en ambos casos, lesión levantada única del tipo Yamada II-III. Las biopsias obtenidas inicialmente mediante pinza convencional fallaron para establecer el diagnóstico, el cual se obtuvo mediante toma de biopsias en profundidad y biopsia en ojal. Los hallazgos de anatomía patológica se interpretaron como tumor típico carcinoide de tipo A, localizado en la submucosa. En ninguno de los dos casos se presentó síndrome carcinoide típico o atípico; las determinaciones de 5-HIAA y serotonina fueron normales. Ambos casos presentaban pérdida de sangre por tracto gastrintestinal proveniente de ulceración en el pólipo gástrico. En ambos pacientes se hizo resección gástrica segmentaria
Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Tumor Carcinoide/patologia , Tumor Carcinoide/fisiopatologia , Tumor Carcinoide/cirurgiaRESUMO
Se presenta una paciente con colitis ulcerativa idiopática (CUI) y pioderma gangrenoso (PG). Las lesiones dermicas evolucionaron paralelas con la enfermedad intestinal, las cuales respondieron favorablemente al tratamiento con sulfazalazina