Backgroundporocarcinoma is a rare sort of skin cancer developing from sweat glands. Its clinical course and management are not well understood.Objectivesthe current meta-analysis is to address the presentation and management of porocarcinoma.Data sourcesWeb of Science, PubMed, MEDLINE on OVID and Google scholar were searched for English-language studies published before December 1, 2016.ResultsThe review of literature revealed 453 cases. From which 222 (49%) cases were male and female were 231 (51%). The mean age was 67.57 years. The mean duration of presentation was 5.57 years ranging from 4 days to 60 years of age. The most common site of affection is the head and neck (39.9%) followed by lower extremity (33.9%). Mass and nodule are the most common modes of presentation. Metastasis occurred at presentation in 110 (31%) cases. The most common organ to which porocarcinoma metastizes is the nearby lymph node (57.7%).ConclusionsPorocarcinoma is an aggressive skin cancer. Surgery is the main modality of treatment.Systematic review registration numberreviewregistry233.

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Background Pilonidal sinus disease (PNS) is a disorder of the young population. The aim of this study is to analyze the risk factors associated with development of PNS in the secondary school students. Methods This case control study enrolled 189 participants, (Control group: 95 cases, case group: 94 cases). The inclusion criterion for the trial group was those secondary school students with PNS and age ranged between 16 and 20 years without the known risk factors of PNS. Result About 80 (42.3%) patients were male and 109 (57.7%) were female. Each group included 95 patients. There was no significant difference in both groups regarding basic features. Among the control group 36 (37.9%) participants were used to study while sitting on a hard place whereas among the case group 62 (66%) cases were used to study while sitting on a hard place, the difference was statistically significant (<0.001). Conclusion Sitting on the hard places could be regarded as a risk factor of developing PNS among secondary school students.

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The trend through which academia finances scientific publication has been changed into open access publishing, the latter is exploited by predatory journals and publishers. The aim of this paper is to review the current situation of predatory publishing and introduce Kscien's list of predatory journals and publishers. Kscien has recruited a special committee consisting of 23 young researchers. They are working unceasingly to keep the list refurbished, expose current tricks invented by the predators and guide authors. The list is designed to be updated daily. Currently, the criteria used to recognize predatory journals and publishers basically depend on the journal's misconduct, fabrication and inadequate peer review. Researches are ongoing to recapitulate more solid criteria with objective evidence to overcome the critics faced by Beall. Kscien's list has been proposed to replace the vanished Beall's list from the interior of the drawn region in fake journals and publishers. Highlights:

The trend through which academia finances scientific publication has been developing in recent years towards open access publishing, which can be exploited by predatory journals and publishers. The aim of this paper is to review the current situation of predatory publishing and introduce Kscien's list of predatory journals and publishers. Kscien has recruited a special committee consisting of 23 young researchers. They are working to keep the list up-to-date, expose current tactics of the predators and guide authors. The list is designed to be updated daily. Currently, the criteria used to recognize predatory journals and publishers depends on the journal's conduct, evidence of fabrication and levels of peer review. Research is ongoing to provide more solid criteria and objective evidence to overcome the critics of Beall. Kscien's list could help to fill the gap left by Beall's list.

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