1,721,223 research outputs found
Hemorrhagic Corpus Luteum Cyst. an unusual problem for pediatric surgeons
No full textAbstract
STUDY OBJECTIVE:
Hemorrhagic corpus luteum cysts (HCLC) constitute a common disorder in pediatric subjects undergoing surgical intervention. HCLCs especially develop in the early period after menarche, and they are commonly associated with dysfunctional ovulation.
DESIGN:
Retrospective analysis of surgery outcome of HCLC patients.
SETTING:
Pediatric Surgery Unit, S. Chiara University Hospital.
PARTICIPANT:
13 girls with HCLC diagnosis.
INTERVENTIONS:
Surgical treatment of HCLCs.
MAIN OUTCOME MEASURES:
We reviewed the clinical presentation and outcome of 13 post-menarcheal girls surgically treated for HCLCs in the Pediatric Surgical Unit from 2002 to 2006.
RESULTS:
Primary presentation was persistent abdominal pain in 84.6% and acute abdominal pain in 15.4% of patients, respectively. Ultrasound examination showed complex ovarian masses in 77.23% cases and simple ovarian masses in 33.7% cases, respectively. Although laparoscopic excision of HCLC was performed in more than 45% cases, laparotomic approach was commonly required. After conservative surgery, ovarian size and viability were normal, as assessed by 6-month ultrasound scan. No recurrences of disease and regular menses were reported at 2 years follow-up.
CONCLUSIONS:
In pediatric subjects with HCLC that required surgical intervention, no complications or disorder recurrence were reported. In order to preserve ovarian function, conservative surgery has to be performed whenever feasible.
PMID: 19539202 [PubMed - indexed for MEDLINE
Funtional ovarian lesions in children and adolescents : when to remove them.
No full textAbstract
STUDY OBJECTIVE:
Functional ovarian lesions represent 45% of all pediatric adnexal abnormalities. Their surgical management, even if frequent, is not clear, especially in pediatric age.
MATERIALS AND METHODS:
We retrospectively reviewed 22 pediatric patients surgically treated for functional ovarian lesions from 2000 to 2006. The following characteristics were analysed: age, size of the lesion, ultrasound (US) aspect and clinical presentation.
RESULTS:
The average age was 16.1 years of age (range: 6 months-18 years). Of the 22 functional lesions, 12 (55%) were follicular cysts and 10 (45%) corpus luteum ones. The average size was 6.7 cm (range: 5.1-33 cm). US scan showed simple lesions in 10 cases (45%) and complex ones in 12 cases (55%). In 16 girls (72.8%) the presenting symptom was abdominal pain while 2 patients (9%) presented abdominal distention. In the other 4 patients (16.2%) the lesion was found accidentally during US examination.
CONCLUSION:
In pediatric subjects, functional ovarian cysts rarely required surgical intervention, though no complications or disorder recurrence were reported. To preserve ovarian function, conservative surgery has to be performed whenever feasible.
PMID: 19340623 [PubMed - indexed for MEDLINE
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
Reply to comment on lecca, l.I.; portoghese, i.; mucci, n.; galletta, m.; meloni, f.; pilia, i.; marcias, g.; fabbri, d.; fostinelli, j.; lucchini, r.g.; cocco, p.; campagna, m. association between work-related stress and qt prolongation in male workers
Full text linkDispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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