P. Vergara

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Pathogenic and protective roles have been attributed to gut commensal microbiota (GCM) in gastrointestinal inflammatory and functional disorders. We have shown that the adaptation to a new environment implies specific changes in the composition of GCM. Here we assessed if environment-related adaptive changes of GCM modulate the expression of colonic(More)
BACKGROUND Several types of C1-C2 fixation techniques have been described over the years in order to treat atlantoaxial instability. OBJECTIVE To compare the pros and cons of the most popular C1-C2 posterior fixation used today: C1 lateral mass-C2 pedicle screw and rods (Harms) and transarticular screw (Magerl) fixations. METHODS Retrospective review of(More)
OBJECTIVE Large schwannomas with intradural and extradural extensions are often challenging surgical lesions. A variety of approaches, usually requiring large exposures, removal of facets and pars interarticularis, and spinal stabilization, have been described. The aim of this study is to describe the "dual approach," a less invasive technique for the(More)
CONTEXT Surgery for the rheumatoid cervical spine has been shown to stabilize the unstable spine; arrest/improve the progression of neurological deficit, help neck pain, and possibly decelerate the degenerative disease process. Operative intervention for the rheumatoid spine has significantly changed over the last 30 years. AIMS The purpose of this study(More)
OBJECTIVES To report an exceptional case of dural arteriovenous fistula of the tentorial incisura presenting as transient and recurrent isolated paresis of the fourth cranial nerve, and treated by endovascular embolization. CASE REPORT A 63-year-old man presented several episodes of intermittent diplopia which appeared during sudden head movements and in(More)
Meningiomas with exclusive or prevalent dural attachment over the transverse-sigmoid sinus junction area represent a well-defined subgroup of posterior fossa meningiomas. This study reports 13 cases of this localisation (10.8% of all infratentorial meningiomas). In this series, six patients (46%) were discovered as an incidental MR finding. One patient with(More)
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