Gil-Robles S.,Hospital Quiron |
Duffau H.,Montpellier University
Neurosurgical Focus | Year: 2010
Object. Recent surgical studies have demonstrated that the extent of resection is significantly correlated with median survival in WHO Grade II gliomas. Consequently, thanks to advances in intraoperative functional mapping, the authors questioned whether it is actually necessary to leave a "security" margin around eloquent structures. Methods. The authors first reviewed the classic literature, especially that based on epilepsy surgery and functional neuroimaging techniques, which led them to propose the rule of a security margin. Second, they detailed new developments in the field of intrasurgical electrical mapping, especially with regard to subcortical stimulation of the projection and long-distance association pathways. On the basis of these advances, the removal of gliomas according to functional boundaries has recently been suggested, with no margin around eloquent structures. Results. Comparative results showed that the rate of permanent deficit was similar with or without a security margin, that is, < 2%. However, a higher rate of transient neurological worsening in the immediate postsurgical period was associated with the absence of a margin, with recovery following adapted rehabilitation. On the other hand, the extent of resection was in essence improved with no margin. Conclusions. This no-margin technique, based on the subpial dissection, and the repetition of both cortical and subcortical stimulation to preserve eloquent cortex as well as the white matter tracts (U-fibers, projection pathways, and long-distance connectivity) allow optimization of the extent of resection while preserving the quality of life (despite transitory impairment) thanks to mechanisms of brain plasticity.
Fayed N.,Hospital Quiron |
Modrego P.J.,Hospital Universitario Miguel Servet |
Salinas G.R.,Hospital Quiron |
Gazulla J.,Hospital Universitario Miguel Servet
Journal of Alzheimer's Disease | Year: 2012
Alzheimer's disease (AD) is the most common cause of dementia in elderly people in western countries. However important goals are unmet in the issue of early diagnosis and the development of new drugs for treatment. Magnetic resonance imaging (MRI) and volumetry of the medial temporal lobe structures are useful tools for diagnosis. Positron emission tomography is one of the most sensitive tests for making an early diagnosis of AD but the cost and limited availability are important caveats for its utilization. The importance of magnetic resonance techniques has increased gradually to the extent that most clinical works based on AD use these techniques as the main aid to diagnosis. However, the accuracy of structural MRI as biomarker of early AD generally reaches an accuracy of 80%, so additional biomarkers should be used to improve predictions. Other structural MRI (diffusion weighted, diffusion-tensor MRI) and functional MRI have also added interesting contribution to the understanding of the pathophysiology of AD. Magnetic resonance spectroscopy has proven useful to monitor progression and response to treatment in AD, as well as a biomarker of early AD in mild cognitive impairment. © 2012 - IOS Press and the authors. All rights reserved.
Pareja R.,Institute Cancerologia Las Americas |
Rendon G.J.,Institute Cancerologia Las Americas |
Sanz-Lomana C.M.,Hospital Quiron |
Monzon O.,Hospital San Jose |
Ramirez P.T.,University of Houston
Gynecologic Oncology | Year: 2013
Objective. Radical trachelectomy is a standard treatment for selected patients with early-stage cervical cancer. Outcomes arewell established for vaginal radical trachelectomy (VRT), but not for abdominal radical trachelectomy (ART). Methods. We searchedMEDLINE, EMBASE, and CINAHL (October 1997 through October 2012) using the terms: uterine cervix neoplasms, cervical cancer, abdominal radical trachelectomy, vaginal radical trachelectomy, fertility sparing, and fertility preservation.We included original articles, case series, and case reports. Excluded were review articles, articles with duplicate patient information, and articles not in English. Results. We identified 485 patients. Ages ranged from 6 to 44 years. Themost common stage was IB1 (331/464; 71%), and the most common histologic subtype was squamous cell carcinoma (330/470; 70%). Operative times ranged from 110 to 586 min. Blood loss ranged from 50 to 5568 mL. Three intraoperative complications were reported. Forty-seven patients (10%) had conversion to radical hysterectomy. One hundred fifty-five patients (35%) had a postoperative complication. The most frequent postoperative complication was cervical stenosis (n = 42; 9.5%). The median follow-up time was 31.6 months (range, 1-124). Sixteen patients (3.8%) had disease recurrence. Two patients (0.4%) died of disease. A total of 413 patients (85%) were able tomaintain their fertility. A total of 113 patients (38%) attempted to get pregnant, and 67 of them (59.3%) were able to conceive. Conclusion. ART is a safe treatment option in patients with early-stage cervical cancer interested in preserving fertility. © 2013 Elsevier Inc. All rights reserved.
Alentorn-Geli E.,Hospital Quiron |
Lajara F.,Hospital Vega Baja Orihuela |
Samitier G.,Hospital 9 Of Octubre |
Cugat R.,Hospital Quiron
Knee Surgery, Sports Traumatology, Arthroscopy | Year: 2010
The transtibial (TT) drilling of the femoral tunnel in the bone-patellar tendon-bone (BPTB) anterior cruciate ligament (ACL) reconstruction was found to place the tunnel non-anatomically. The use of the anteromedial portal (AMP) for the femoral drilling would provide the surgeon with more freedom to anatomically place the tunnel in the real femoral ACL footprint. The purpose of this study was to compare the clinical outcomes of BPTB ACL reconstruction using the AMP or the TT technique for the femoral tunnel drilling. A Medline search was not able to identify any study directly comparing the clinical outcomes of the AMP and the TT techniques. The literature search identified experimental and quasi-experimental studies published from 1966 to March 2009 where at least one group underwent arthroscopic autologous BPTB ACL reconstructions using either the AMP or the TT technique for the femoral tunnel drilling. Overall IKDC, Lysholm score, activity level, range of motion, single-leg hoop test, Lachman test, Pivot shift sign test, KT-1000 arthrometer measurements, and radiographic assessments were indirectly compared between the two groups (AMP versus TT). Twenty-one studies, involving a total of 859 patients (257 in the AMP and 602 in the TT group), were included in this analysis. The AMP group demonstrated significantly earlier return to run and significantly greater range of motion, Lachman test values, and KT-1000 arthrometer measurements in the 1-2-year follow-up, although no differences were found for both the 3-5 and the 6-10-year follow-ups for any of these parameters. In contrast, the TT group demonstrated significantly higher activity level for the 3-5 and 6-10-year follow-up. The use of the AMP elicited greater knee stability and range of motion values, and earlier return to run compared to the TT technique. These results may indicate a potential benefit of the AMP over the TT technique. However, as the benefits of the AMP were not obtained in the mid and long-term follow-ups, overall there is no definitive evidence at this point to conclude that one technique is superior to the other. Randomized controlled trials directly comparing the use of both techniques with long-term follow-ups will help clarify which one, if any, provides best clinical outcomes. © 2009 Springer-Verlag.
Ramirez P.T.,University of Houston |
Pareja R.,Institute Cancerologia Las Americas |
Rendon G.J.,Institute Cancerologia Las Americas |
Millan C.,Hospital Quiron |
And 2 more authors.
Gynecologic Oncology | Year: 2014
The standard treatment for women with early-stage cervical cancer (IA2-IB1) remains radical hysterectomy with pelvic lymphadenectomy. In select patients interested in future fertility, the option of radical trachelectomy with pelvic lymphadenectomy is also considered a viable option. The possibility of less radical surgery may be appropriate not only for patients desiring to preserve fertility but also for all patients with low-risk early-stage cervical cancer. Recently, a number of studies have explored less radical surgical options for early-stage cervical cancer, including simple hysterectomy, simple trachelectomy, and cervical conization with or without sentinel lymph node biopsy and pelvic lymph node dissection. Such options may be available for patients with low-risk early-stage cervical cancer. Criteria that define this low-risk group include: squamous carcinoma, adenocarcinoma, or adenosquamous carcinoma, tumor size < 2 cm, stromal invasion < 10 mm, and no lymph-vascular space invasion. In this report, we provide a review of the existing literature on the conservative management of cervical cancer and describe ongoing multi-institutional trials evaluating the role of conservative surgery in selected patients with early-stage cervical cancer. © 2013 Elsevier Inc.
Escudero-Ortiz V.,Hospital Quiron |
Perez-Ruixo J.J.,Amgen Inc. |
Valenzuela B.,Hospital Quiron
Therapeutic Drug Monitoring | Year: 2013
A selective and precise high-performance liquid chromatography ultraviolet method was developed and validated for the determination of lapatinib in human plasma. After protein precipitation with acetonitrile, lapatinib and sorafenib were separated using isocratic elution (on a C18 Ultrabase column using a mobile phase of acetonitrile/20 mM ammonium acetate in a proportion 53:47 (v/v) pumped at a constant flow rate of 1.2 mL/min). Quantification was performed at 260 nm. Calibration curves were linear over the range 0.2-10 μg/mL. Inter- and intraday coefficients of variation were less than 7%. The limit of detection and the lower limit of quantification were 0.1 and 0.2 μg/mL, respectively. Recoveries of lapatinib from plasma were higher than 86.7% in all cases. The assay was applied to the determination of the drug in the plasma of 2 cancer patients receiving lapatinib, 1000 and 1250 mg orally, and could be useful for therapeutic drug monitoring of lapatinib in routine clinical practice. Copyright © 2013 by Lippincott Williams & Wilkins.
Izquierdo-Dominguez A.,Hospital Quiron |
Valero A.L.,Hospital Clinic i Universitari |
Mullol J.,Hospital Clinic i Universitari
Current Allergy and Asthma Reports | Year: 2013
Allergic rhinitis (AR) is a worldwide health problem that generates a significant healthcare burden in adults, adolescents, and children. Epidemiological studies have indicated that the prevalence of AR has progressively increased over the last three decades in developed and industrialized countries. AR currently affects up to 40 % of the worldwide population, with differences between adults and children and different countries of the World. Although not life-threatening, AR symptoms are frequently bothersome, adversely affecting work and quality of life of the affected patients, and causing a significant burden on both the individual and society. The symptoms have the potential to lead to both physical and mental complications, with sleep-disordered breathing in childhood and adolescence being associated with disorders in learning performance, behavior, and attention. Clinical features and comorbidities are very important for the "allergic march", and in both adults and children there is some evidence of association between AR and asthma. ARIA classifications of both symptom duration (intermittent, persistent) and severity (mild, moderate, severe) have been validated in both adult and pediatric populations. Based on the duration and severity of patient's disease, an appropriate treatment strategy has been issued for both adults and children, which consists of patient's education, allergen avoidance, and pharmacological as well as allergen-specific immunotherapy treatment. The present review will attempt to compare the characteristics of AR between children and adults, either in the epidemiology, clinical features, impact on QOL, and management of the disease. © 2012 Springer Science+Business Media New York.
Ferre A.,Hospital Quiron
Neurologia | Year: 2016
Introduction: Chronic fatigue syndrome (CFS) is characterised by the presence of intractable fatigue and non-restorative sleep, symptoms which are also very prevalent in multiple diseases and appear as side effects of different drugs. Numerous studies have shown a high prevalence of sleep disorders in patients with CFS. However, non-restorative sleep and fatigue are frequently symptoms of the sleep disorders themselves, so primary sleep disorders have to be ruled out in many cases of CFS. Development: This review was performed using a structured search of the MeSH terms ([Sleep] + [Chronic fatigue syndrome]) in the PubMed database. Conclusion: Identifying primary sleep disorders in patients meeting diagnostic criteria for CFS will allow for a more comprehensive treatment approach involving new diagnostic and therapeutic strategies that may improve quality of life for these patients. © 2016 Sociedad Española de Neurología.
Vegas M.R.,Hospital Quiron |
Martin Del Yerro J.L.,Hospital Quiron
Aesthetic Plastic Surgery | Year: 2013
Background: Postoperative tissue stretch deformities are among the possible complications in breast augmentation. These deformities are responsible for many potential risks such as bottoming-out deformity, breakdown of the inframammary fold, permanent tissue atrophy, sensory loss, and breast distortion (visible implant edges and traction rippling), among others. Although the elastic properties of the breast are a major concern for plastic surgeons, concepts such as stiffness, compliance, elasticity, and resilience have not been sufficiently defined or explored in the plastic surgery literature. Methods: Similar to any other material, living tissues are subject to the fundamentals of the mechanics of materials. Based on their experience with more than 5,000 breast augmentations, the authors explored the basic fundamentals of the mechanics of materials in search of a rational explanation for long-term results in breast augmentation and augmentation-mastopexy. Results: A basic law of the mechanics of materials determines that when a material (e.g., breast) is loaded with a force (e.g., implant), it produces a stress that causes the material to deform (e.g., breast augmentation), and this behavior might be graphed in a theoretical material's stress-stress curve. This deformation will increase with time although the load (implant) remains constant, a concept termed "creep deformation." Because the breast, like all human tissues, is a viscoelastic material, the application of concepts such as elastic and plastic deformation, stiffness, compliance, resilience, and creep deformation can and should be applied to breast augmentation surgery. Conclusions: The authors have found that the principles of the mechanics of materials can provide plastic surgeons with some clues for a predictable, long-lasting good result in breast augmentation and augmentation-mastopexy. Future studies are needed to develop these concepts and evaluate how they might individually determine the mid- and long-term outcomes of augmented breasts. Level of Evidence V: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266. © 2013 Springer Science+Business Media New York and International Society of Aesthetic Plastic Surgery.
Seijas R.,Hospital Quiron
Journal of orthopaedic surgery (Hong Kong) | Year: 2012
We report a 44-year-old woman with calcific tendinitis of the shoulder treated with platelet-rich plasma injection. Prior to this, she had no improvement of the symptoms after 6 weeks of ultrasound treatment, Codman exercises, and anti-inflammatory treatment. Platelet-rich plasma was injected into the subacromial area 3 times at 2-week intervals. She had progressive improvement of pain after 2 weeks, and was asymptomatic at week 6. The patient then underwent the previous protocol of rehabilitation. At the one-year follow-up, the patient was pain-free and had complete resolution of calcific tendinitis. The patient had regained full range of movement and had resumed all her activities.