Toward a metabolic theory of catchments: Scaling of water and carbon fluxes with size.

Allometric scaling relations are widely used to link biological processes to body size in nature. Several studies have shown that such scaling laws hold also for natural ecosystems, including individual trees and forests, riverine metabolism, and river network organization. However, the derivation of scaling laws for catchment-scale water and carbon fluxes has not been achieved so far.

How Covid-19 changed the epidemiology of febrile urinary tract infections in children in the emergency department during the first outbreak.

Background: The first Covid-19 pandemic affected the epidemiology of several diseases. A general reduction in the emergency department (ED) accesses was observed during this period, both in adult and pediatric contexts.

Methods: This retrospective study was conducted on the behalf of the Italian Society of Pediatric Nephrology (SINePe) in 17 Italian pediatric EDs in March and April 2020, comparing them with data from the same periods in 2018 and 2019.

Rayleigh-Bénard convection with thermal boundary inhomogeneities.

Rayleigh-Bénard convection with nonhomogeneous thermal boundaries (sinusoidal temperature patterns set in-phase at the top and bottom plates) is numerically studied in three- and two-dimensional domains. Two spatial convective scales occur: the one due to the self-organized clustering of plumes-which is known to appear in homogeneous conditions-and the scale induced by the boundary heterogeneities. The latter drives the convection patterning, both in 3D and 2D, when the wavelength of the perturbation is comparable with the self-organized one.

Ullrich-Turner Syndrome and Tumor Risk: Is There Another Chance to Early Gonadectomy in Positive TSPY and SRY Patients?

The presence of the Y chromosome in the karyotype of patients with disorders of sex differentiation is significantly associated with an increased risk to develop specific types of malignancies, predominantly type II germ cell tumors (GCTs). Gonadoblastoma in the gonads without an obvious testicular differentiation and intratubular germ cell neoplasia of unclassified type in testicular tissue are the precursor lesions of most GCTs. Gonadal dysgenesis, the characteristic feature of Ullrich-Turner syndrome (UTS), further contributes to increase this tumor risk.

Changing concepts in microsurgical pediatric varicocelectomy: is retroperitoneal approach better than subinguinal one?

Purpose: To compare and to assess two different microsurgical "lymphatic-sparing" techniques (subinguinal/inguinal vs. retroperitoneal) used for the treatment of a pediatric and adolescent varicocele in terms of success rate, complications and mean operative time.

Materials And Methods: A retrospective study included 54 consecutive patients affected by a varicocele and treated with a microsurgical (loupes--operating microscope) magnification.

Cobb's collar: a rare cause of urinary retention.

Cobb's collar is a membranous stricture of the bulbar urethra, often misdiagnosed, potentially leading to acute urinary retention, upper urinary tract dilations, enuresis, infectious diseases, poor streaming and haematuria. A 14-year-old boy with a history of previous hospitalisations came to our attention. A Cobb's collar was diagnosed and successfully managed with a videoendoscopic one-step approach.

Management and follow-up of pediatric asymptomatic testicular microlithiasis: are we doing it well?

Purpose: To define timing and methods for a balanced follow-up of testicular microlithiasis (TM) in pediatric age.

Materials And Methods: We retrospectively reviewed medical records of 21 pediatric asymptomatic patients (42 testicular units) diagnosed with TM and without associated risk factors. Microliths were found bilaterally on ultrasonography in all the patients.

The impact of perinatal urinoma formation on renal function: our experience and review of the literature.

Introduction: A urinoma is a fluid mass consisting of extravasated urine in the perirenal space. Its impact on renal function was analysed.

Methods: All cases of prenatal and neonatal urinoma reported in the literature were analysed as well as two cases recently observed in our department.

Endoscopic management of a type IV syringocele causing massive perirenal urinoma in an infant.

The finding of a urinoma in the fetal and neonatal period is almost always related to an obstruction distal to the collection itself. Syringocele is a congenital or acquired dilation of a bulbourethral Cowper's gland. An exceedingly rare case of neonatal anterior urethral obstruction caused by a syringocele and manifesting itself with a dramatic clinical onset is presented.