Résumé
STUDY DESIGN: Prospective cohort study. PURPOSE: In this study, we investigated the frequency of vertebral endplate Modic changes (MCs) and their effects on surgical outcomes in patients with unstable lumbar spines. OVERVIEW OF LITERATURE: Signal changes in endplates have been classified into three types by Modic. The prognostic role of MCs has been investigated in various spinal disorders. METHODS: A series of 70 patients with clinical and radiographic unstable lumbar spine were included in the study. Endplate signal intensity was determined according to Modic classification. All patients underwent instrumented posterolateral fusion. Functional evaluation was made using the visual analog scale (VAS) and Oswestry disability index (ODI). RESULTS: Eighteen patients (26%) had normal endplate intensity, 31 patients (44%) had MC type I, 20 patients (28%) had MC type II, and one patient (1.4%) had MC type III. Pain level VAS and ODI decreased significantly from the preoperative evaluation to the six-month and one-year postoperative evaluations. The surgical outcome (VAS and ODI) was not significantly different between the various types of MC. CONCLUSIONS: Posterolateral fusion is an effective treatment in patients with unstable lumbar spines. MC do not have a significant effect on the surgical outcome of these patients.
Sujets)
Humains , Classification , Études de cohortes , Dégénérescence de disque intervertébral , Études prospectives , Arthrodèse vertébrale , Rachis , Échelle visuelle analogiqueRésumé
Pial arteriovenous fistulas (pAVF) are rare vascular lesions consisting of one or more arterial connections to a single venous channel without any intervening nidus of vessels or capillaries. Case 1: A 65-year-old woman with a complaint of headache and left hand paresthesia was referred to us. Magnetic resonance imaging showed a large saccular lesion with signal void in the posterior part of the right sylvian fissure and catheter angiography showed a giant venous aneurysm fed by one branch of the middle cerebral artery (MCA) and draining into the vein of Trolard. Case 2: A 12-year-old boy was transferred to our hospital with a history of sudden loss of consciousness and hemiplegia. Brain computed tomography revealed a massive hemorrhagic mass in the right hemisphere and cerebral angiography showed a pAVF with a large aneurysmal varix, which was fed by multiple branches of the right MCA and draining into the superior sagittal sinus. Both patients underwent craniotomy and after ligation of vascular connections, aneurysmal varices were removed completely. Surgical resection can be a safe method for treatment of pAVFs, particularly in those with large varices.
Sujets)
Sujet âgé , Enfant , Femelle , Humains , Mâle , Anévrysme , Angiographie , Fistule artérioveineuse , Encéphale , Vaisseaux capillaires , Cathéters , Angiographie cérébrale , Craniotomie , Main , Céphalée , Hémiplégie , Ligature , Imagerie par résonance magnétique , Microchirurgie , Artère cérébrale moyenne , Paresthésie , Sinus sagittal supérieur , Perte de conscience , Varices , VeinesRésumé
Bronchiectasis is a chronic debilitating condition characterized by abnormal dilated thickwalled bronchi. To investigate humoral immune function in bronchiectatic patients, this study was performed. Forty patients with established diagnosis of bronchiectasis, who were referred from two tertiary care pulmonology centers in Tehran, were investigated in this study. Immunoglobulin isotypes concentrations and IgG-subclasses were measured by nephelometry and enzymelinked immunosorbent assay [ELISA] methods, respectively. All patients received unconjugated pneumococcal vaccine, and blood samples were taken before and 21 days after vaccination. Specific antibodies against whole pneumococcal antigens were measured using the ELISA method. Fifteen [37.5%] out of 40 patients were diagnosed to have defects in antibody mediated immunity including 5 [12.5%] patients with immunoglobulin class deficiency [2 with common variable immunodeficiency and 3 with IgA deficiency], 3 [7.5%] with IgG subclass deficiency and 7 [17.5%] patients had Specific antibody deficiency [SAD] against polysaccharide antigen despite normal levels of serum immunoglobulins and IgG subclasses. Our study along with several other studies confirmed that all patients with bronchiectasis should undergo thorough immunological evaluation in order to identify the presence of the underlying immunologic defect. This evaluation should include serum immunoglobulins, IgG subclasses concentrations and also determination of serum antibodies against pneumococcal antigens. Early diagnosis and appropriate treatment will prevent the subsequent complications and improve quality of life of affected individuals