Well differentiated papillary mesothelioma of the tunica vaginalis: case report.

Well differentiated papillary mesothelioma (WDPM) is a rare entity making up 0.3-5% of all mesothelioma cases, while manifestations of the tunica vaginalis are even more uncommon. Literature on WDPM is scarce and our understanding is rather limited. Cellular architecture, stromal invasion, mitotic activity and immunohistochemical markers are used to distinguish well differentiated entities from more malignant subspecies. These cases confront both pathologists and clinicians with a hefty diagnostic challenge. Although no paratesticular WDPM specific mortality has been reported, the prognosis of a malignant mesothelioma is very poor. A correct diagnosis is therefore of the utmost importance. In this paper we provide an overview on the diagnosis and differentiation of mesotheliomas of the tunica vaginalis. Furthermore, we highlight pitfalls and build up a recommended therapeutic strategy.

Use of fosfomycin as targeted antibiotic prophylaxis before prostate biopsy: A prospective randomized study.

OBJECTIVES: To investigate whether switching ciprofloxacin to fosfomycin in the case of fluoroquinolone-resistant rectal bacteria influences the incidence of infectious complications after transrectal prostate biopsy. METHODS: From December 2015 until December 2017, patients undergoing prostate biopsy were randomly assigned to a control group or an intervention group in a prospective, open-label fashion at three different centers. The presence of fluoroquinolone-resistant organisms was detected by rectal swabs. Patients in the control group received ciprofloxacin. Patients in the intervention group received fosfomycin instead of ciprofloxacin in the case of fluoroquinolone-resistant bacteria on rectal swab culture. The primary end-point was the difference in occurrence of major (febrile) and minor (afebrile) infections between both groups. RESULTS: A total of 102 patients were randomized to the control group, and 102 patients to the intervention group. In the control group, nine complications occurred, of which five were major febrile complications. In the intervention group, six complications occurred, of which four were major febrile complications. The total number of complications (major and minor) did not differ between both groups (P = 0.59). A subgroup analysis of patients with fluoroquinolone-resistant bacteria on rectal swab showed five complications in the control group and one complication in the intervention group (P = 0.09). CONCLUSIONS: This represents the first prospective randomized study using rectal cultures for targeted antibiotic prophylaxis. Study findings show promising results for use of fosfomycin in patients with fluoroquinolone resistance.