1,721,055 research outputs found
Treatment of congenital nasolacrimal duct cyst: The role of endoscopic marsupialisation
Full text linkObjective. Congenital nasolacrimal duct cyst (NLDC) is a rare disorder, which can present with ophthalmological and nasal signs and symptoms. The authors analyse their personal experience to identify diagnostic criteria for NLDC, which were treated by endoscopic transnasal procedure. Methods. Clinical records of patients with a diagnosis of NLDC were retrospectively reviewed. All patients underwent rhinoscopy and ophthalmologist evaluation before surgery, whereas imaging was performed in selected cases. All neonates underwent transnasal endoscopic marsupialisation after failure of conservative medical therapy. Results. Five patients were included in the study. One patient presented bilateral NLDC. In 3 cases, CT scan of the sinus was carried out. A total of 6 marsupialisation procedures were performed and a bi-canalicular lacrimal stent was positioned in 1 case. Complete remission of symptoms was observed in all cases. Conclusions. Nasal endoscopy is mandatory to diagnose NLDCs, and, in some cases, it can be complemented by radiological procedures. When symptoms persist after systemic and topical therapy, nasal endoscopic marsupialisation is the treatment of choice. This surgical procedure is effective, safe and can be repeated if needed
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Sialoendoscopy for treatment of juvenile recurrent parotitis: The Brescia experience
No full textObjective To evaluate the role of sialoendoscopy associated with steroid irrigation for juvenile recurrent parotitis (JRP) at a tertiary referral hospital. Methods Clinical records of patients affected by JRP and treated with operative sialoendoscopy between June 2011 and April 2017 were retrospectively reviewed. Data on demographics, number of acute episodes per year before and after surgery, characteristics of the surgical procedure, hospitalization time, and rate of complications were collected. The outcome of the procedure was measured by comparing the number of episodes of parotid swelling before and after salivary endoscopic treatment. Results Twenty-three patients for a total of 34 operative sialoendoscopies were included in the study. Before the surgical endoscopic procedure, the mean number of parotid swelling was 10 episodes per year. At sialoendoscopy, typical endoscopic findings such as mucous plugs, stenosis of the duct, intraductal debris, and pale ductal appearance were evident. All patients were discharged on the first postoperative day. A significant decrease in the number of swelling episodes per year was observed compared to the preoperative rate (p =.0004). Complete resolution of the disorder was obtained in 35% of patients. Conclusions Operative sialoendoscopy with steroid irrigation can be considered a valid therapeutic treatment for JRP. The technique is conservative, effective, safe, and, potentially repeatable. Short hospitalization time, rapid recovery, absence of peri-operative complications, and a high rate of good outcomes are the main advantages of this treatment
Long-term neurological morbidity following endoscopic transnasal resection of juvenile angiofibroma
Full text linkAlthough transnasal endoscopic resection (TER) of juvenile angiofibroma (JA) is unquestionably less invasive than traditional external approaches, several endonasal and neurovascular structures are sacrificed during the procedure. The aim of this study was to evaluate long-term neurological morbidity and related quality of life following TER of JA
Reshaping head and neck reconstruction policy during the COVID-19 pandemic peak: Experience in a front-line institution
Full text linkTHE ROLE OF ENDOSCOPIC SINUS SURGERY IN PEDIATRIC PATIENTS WITH CYSTIC FIBROSIS
No full textCystic fibrosis (CF) is the most common life threatening autosomal recessive disorder affecting Caucasians. Molecular genetic mutations in the CF transmembrane conductance regulator (CFTR) gene alter function of CFTR protein, which leads to dysfunction in chloride channel on epithelial surface of exocrine glands. In the head and neck area, the pathology involves mostly paranasal sinuses starting from childhood. Chronic and recurrent rhinosinusitis with or without nasal polyposis and mucocele of sinuses are the main disorders observed in CF patients. About 20-25% of these patients will require sinus surgery. Regarding surgical treatment, endoscopic sinus surgery (ESS) for management of paranasal sinus diseases in CF patients is undoubtedly a challenge for the surgeon. Moreover, evidence-based guidelines regarding the precise indications for surgery are currently lacking. Even if ESS is undeniably needed for management of sinonasal complications and can improve CF-related nasal symptoms, its role with regards to timing of surgery and consequent improvement of pulmonary function is not well described. Moreover, underlying medical issues such as acquired coagulopathies and advanced pulmonary disease, raise perioperative morbidity in these patients, with consequent and prolonged hospitalization. Indeed, the surgeon is often faced with distorted anatomy, due to anomalous development of nasal and paranasal structures or multiple revision operations. Therefore, multidisciplinary management of paranasal sinus disease in patients affected by CF is pivotal to achieve the correct surgical indication, prepare the patient for surgery, and address possible perioperative complications. The authors describe the indications of ESS in CF patients, analyzing personal experience in the diagnosis and treatment of CF-related sinus disorders. Finally, data on follow-up after ESS, pulmonary function, and nutritional status will be presented
How aggressive should resection of inverted papilloma be? Refinement of surgical planning based on the 25-year experience of a single tertiary center
No full textBackground: The technique for transnasal endoscopic resection of inverted papilloma (IP) has evolved considerably during the last 20 years. The aim of the present study is to retrospectively analyze a single tertiary center series, with special emphasis on assessing the value of an “insertion-driven” technique on local control. Methods: Patients undergoing endoscopic resection for IP at the University of Brescia during the period 1991 to 2015 were enrolled. Site of origin and extension of IPs were assessed, together with presence of dysplasia and carcinoma in situ. Patients were divided in 3 cohorts: (1) historical cohort (treated before 2008), (2) contemporary “centripetal” cohort (treated with a traditional technique after 2008), and (3) contemporary “insertion-driven” cohort (treated with insertion-driven resection). Groups were compared considering outcomes and complications. Results: The series included 210 patients. Mean follow-up was 77.8 months. Thirty-eight (18.1%) patients showed precancerous changes. Maxillary involvement (p = 0.021) and presence of precancerous changes (p = 0.013) were significantly associated with a higher risk of recurrence. Five-year local control rate before and after 2008 was 95.1% and 90.5%, respectively. The insertion-driven cohort was associated with lower disease control when IPs involved the maxillary sinus. The rate of complications was 11.9%. The insertion-driven cohort was associated with a lower rate of major complications (p = 0.098). Conclusion: Preoperative evidence of precancerous changes and/or involvement of maxillary sinus should prompt the surgeon to address the disease more aggressively (centripetal resection). Preoperative imaging and biopsy with abundant material may optimize the chance to stratify patients eligible for less or more conservative approaches
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