RESUMEN
The falx cerebelli is a small crescent fold of dura mater that is attached to the internal occipital crest and projects forward into the posterior cerebellar notch between the cerebellar hemispheres. We report a rare case of a 61-year-old female who presented with a 1-month history of headache and gait instability. Imaging findings were suggestive of a meningioma arising from the falx cerebelli. Complete surgical resection was achieved with a standard posterior fossa midline approach. Duraplasty was performed using animal allograft dura (Duraguard) and additional layers of oxidized cellulose preparation (Surgicel), fibrin sealant, and nonsuturable collagen matrix (Duragen) were utilized to reduce the risk of a cerebrospinal fluid leak. Pathology confirmed a World Health Organization (WHO) grade-I meningioma. Postoperatively, patient with asymptomatic thrombosis of the left transverse/sigmoid sinuses and later with a pseudomeningocele managed with a lumbar drain. To our knowledge, this is the second documented case in the literature. We discuss intraoperative nuances and unique aspects in the postoperative care and management of these patients.
RESUMEN
BACKGROUIND: Chiari malformations include a spectrum of congenital hindbrain herniation syndromes. In patients with the most common subtype, Chiari malformation Type I, 50% to 75% develop a syrinx. The pathogenesis of syringomyelia is not well understood, with multiple theories outlined in the literature. Although the presence of a syrinx in a patient with Chiari malformation is generally accepted as an indication for surgical intervention, there are documented cases of spontaneous resolution that support a more conservative approach to management. OBSERVATIONS: The authors reported a case of spontaneous resolution of a cervical syrinx in an adult with an unchanged Chiari malformation. LESSONS: Given the possibility of spontaneous resolution over time, the authors believe a more conservative approach of observation with periodic surveillance, magnetic resonance imaging, and neurological examination should be considered in the management of a patient with a Chiari malformation and associated syringomyelia.
RESUMEN
The plasmid-encoded quinolone resistance gene qnrS1 was recently found to be commonly associated with ciprofloxacin resistance in Nigeria. We mapped the qnrS1 gene from an Escherichia coli isolate obtained in Nigeria to a 43.5 Kb IncX2 plasmid. The plasmid, pEBG1, was sufficient to confer ciprofloxacin non-susceptibility, as well as tetracycline and trimethoprim resistance, on E. coli K-12. Deletion analysis confirmed that qnrS1 accounted for all the ciprofloxacin non-suceptibility conferred by pEBG1 and tetracycline and trimethoprim resistance could be attributed to tetAR and dfrA14 genes respectively. While it contained a complete IncX conjugation system, pEBG1 was not self-transmissible likely due to an IS3 element inserted between the pilX5 and pilX6 genes. The plasmid was however efficiently mobilizable. pEBG1 was most similar to another qnrS1-bearing IncX2 plasmid from Nigeria, but both plasmids acquired qnrS1 independently and differ in their content of other resistance genes. Screening qnrS1-positive isolates from other individuals in Nigeria revealed that they carried neither pEBG1 nor pNGX2-QnrS1 but that IncX plasmids were prevalent. This study demonstrates that the IncX backbone is a flexible platform that has contributed to qnrS1 dissemination in Nigeria.
Asunto(s)
Farmacorresistencia Bacteriana/genética , Escherichia coli/genética , Genes Bacterianos , Plásmidos/genética , Quinolonas/farmacología , Mapeo Cromosómico , Farmacorresistencia Bacteriana/efectos de los fármacos , Escherichia coli/efectos de los fármacos , Escherichia coli/aislamiento & purificación , Funciones de Verosimilitud , Pruebas de Sensibilidad Microbiana , Datos de Secuencia Molecular , Nigeria , FilogeniaRESUMEN
La vida es la prioridad y la alternativa. Fortalecer la vida, dulcificar la muerte, trascender la conciencia del cuerpo, atraer al cuerpo la conciencia del alma: Son los objetivos de todos los terapeutas, desde todas las medicinas, porque la medicina es siempre una alternativa de vida.Por ser hombres, mujeres, llevamos en las manos y en el corazón un sanador. Cada relación humana puede ser sanadora; en una caricia, en un masaje, en la mirada, en el pensamiento compasivo también hay medicina, porque la medicina no son solo técnicas, no es solo conocimiento. La medicina va vestida de mil amores para que el amor construya, para que la enfermedad nos traiga una lección de vida, para que la muerte no sea temida...
