1,720,959 research outputs found
Orchidopexy without ligation of the processus vaginalis is not associated with an increased risk of inguinal hernia
No full textTo report our experience using a modified orchidopexy with division and non-ligation of the processus vaginalis. We performed a single-centre retrospective analysis of all patients who underwent orchidopexy between December 2005 and October 2008 at our institution. In the present technique, the processus vaginalis was gently peeled off the spermatic cord structures as high as possible and severed at the level of the internal inguinal ring without its ligation. Postoperative follow-up was routinely offered to all patients. Additionally, we made a special clinical follow-up, ranging from 1 to 69 months (median 34). One hundred and twenty-three patients, aged 1-11 years (median 3), underwent 147 orchidopexies during the study period. Of these, 25 were accomplished using conventional division and ligation of the processus vaginalis, and in the remaining 122 orchidopexies, the processus vaginalis was only divided. Of the 137 testes available at follow-up, 134 were in the scrotum and 3 (2 %) required re-do orchidopexy due to secondary reascent, including 2 treated with division only of the processus vaginalis. None of the patients experienced postoperative hydrocele or inguinal hernia development. Our findings confirm that division without ligation of a patent processus vaginalis is usually followed by spontaneous peritoneal scarring and complete closure of the internal inguinal ring. Present technique is as effective as traditional orchidopexy and saves extra time spent for meticulous closure of the processus vaginalis or peritoneal tears
Risk Factors for Failure of Endoscopic Balloon Dilatation of Primary Obstructive Megaureter: Single-Center 12-Year Experience with 123 Cases
No full textPurpose: To review our experience with >100 patients with primary obstructive megaureter (POM) undergoing endoscopic balloon dilatation (EBD) and a follow-up of up to 12 years and determine potential risk factors for failure. Our hypothesis is that EBD allows for long-term treatment in >80% of patients, and its effectiveness decreases in more severe cases. Methods: This is a retrospective study of 123 consecutive patients (131 ureters) undergoing EBD from 2009 to 2021. Indications for EBD included symptoms, worsening dilatation, and/or renal function impairment. Clinical characteristics, complications, and outcomes, including those in the patients with >5-year follow-up, were described. Preoperative and intraoperative markers of severity chosen a priori were tested as risk factors for failure. Failure was defined as the need for ureteral reimplantation after EBD. Results: EBD was feasible in 121 of 123 (98%) patients, regardless of age. After a median follow-up of 38 (9-143) months, EBD was effective in 84.5% of cases. Failures generally occurred in the 1st year after EBD and were seldom associated with permanent loss of renal function. Of the 66 patients with follow-up >5 years, EBD was effective in 56 patients. No preoperative characteristic proved to be a risk factor for failure. The intraoperative absence of a ring was the only significant risk factor for failure, odd ratio 117.86 (95% confidence interval 6.27-2215.84). Conclusions: EBD was feasible and definitive treatment in 85% of our cases, regardless of age. Since this study did not identify preoperative factors to help the clinicians in patient selection, we consider EBD a viable initial procedure in all patients with POM who require surgical intervention, especially in infants
Intrahepatic Paratesticular Cyst: Unique Presentation of Vestigial Remnants of Wolffian Duct
No full textTo report on a case of a progressively enlarging intrahepatic cyst in a 1-year-old boy who also presented with bilateral undescended testes. At surgery, the lesion emerged from the anterior surface of the liver but was unexpectedly found to arise from the epididymis of the right testis, which was located intra-abdominally. The histologic findings were consistent with a paratesticular cyst of vestigial remnants derived from the Wolffian duct. Such an unusual event has not been previously reported among the possible location of a paratesticular cyst, nor has it been described in the differential diagnosis of cystic lesions of the liver. UROLOGY 79: 212-214, 2012. (C) 2012 Elsevier Inc
Moving toward laparoscopic pyloromyotomy: an initial Italian experience and national survey
No full text[No abstract available
Renal function adaptation up to the fifth decade after treatment of children with unilateral renal tumor: A cross-sectional and longitudinal study
Full text linkBackground: Mild-to-moderate renal function loss may be an independent risk factor for cardiovascular disease and overall mortality. As in adults with renal carcinoma nephrectomy is associated with an high risk for moderate renal function loss, we aimed to assess the renal function adaptation over a long period of time in children with unilateral renal tumor (URT). Procedure: Seventy-two children who underwent surgery for URT were enrolled in this study. Glomerular filtration rate was estimated (eGFR) with the Modification of Diet in Renal Study or the Schwartz equation, as appropriate for the age. Results: Twelve patients treated by nephron-sparing surgery (Group A) and 42 treated by nephrectomy (Group B) had an age between 2 and 30 years; 18 patients treated by nephrectomy had an age between 33 and 51 years (Group C). At cross-sectional follow-up 8% patients of Group A, 42% of Group B and 78% of Group C presented a mild-to-moderate renal function. The longitudinal data stratified by post-operative intervals showed that patients of Group C presented a significant progressive decrease in mean±standard deviation eGFR (88.1±22.6 during the third decade after surgery vs. 66.6±15.6ml/min/1.73m2 during the fifth decade after surgery; P=0.02). The longitudinal data stratified by age showed that patients with an age between 45 and 54 years presented a mean eGFR significantly lower than that expected for the physiological renal function decline with aging (P=0.001). Conclusion: Aging is associated with a mild-to-moderate renal function loss in many adult patients following nephrectomy during childhood for URT. © 2013 Wiley Periodicals, Inc
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
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