Surgical pathologic report and MR follow-up were used as reference standards. Logistic regression analysis was used to examine the usefulness of these variables for differentiating benign masses from RCCs. Diagnostic performance was analyzed by comparing values for area under receiver operating characteristic curve (A(z)). Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of angular interface for diagnosing benign masses were calculated. Reader agreement was assessed with kappa-weighted statistics and intraclass correlation coefficients (ICCs).

Results:

Of 162 masses, 65 were benign, and 97 were RCCs. The sensitivity, specificity, PPV, NPV, and Az of angular interface for diagnosing benign masses were 78%, 100%, 100%, 87%, and 0.813, respectively. Angular interface (P < .001) was a significant predictor selleck of benign renal mass but mass size (P = .66) was not. There was almost perfect interobserver agreement for mass size (ICC = 0.96) and angular interface (kappa = 0.91).

Conclusion: The presence of an angular interface with the renal parenchyma at single-shot fast SE T2-weighted MR imaging is a strong predictor of benignity in an exophytic renal mass 2 cm or

greater in diameter with high specificity and diagnostic accuracy. (C) RSNA, 2010″
“A 17-year-old Indian boy with gradually progressive ataxia with onset at 12 years of age is described. Magnetic resonance imaging (MRI) Compound C order of Ricolinostat in vivo the brain revealed extensive, inhomogeneous signal abnormalities in the cerebral white matter, with involvement of selected tracts in the brain stem and spinal cord. The imaging findings were characteristic of leukoencephalopathy with brain stem and spinal cord involvement and high lactate, a recently described leukodystrophy. Interestingly, magnetic resonance spectroscopy of the abnormal white matter did not reveal elevated lactate. The patient was compound heterozygous for 2 new mutations in DARS2, genetically confirming the diagnosis.”
“We report the effect of impurity doping at the Mn-site on magnetization and

magnetic entropy change (Delta S-m) in Pr0.6Ca0.4Mn0.96B0.04O3 with B cations having different electronic and spin states [B= Al3+(d(0)), Cr3+(d(3)), Fe3+(d(5)), Co2+(d(7)), Ni2+(d(8)), and Ru4+/5+(d(4/3))]. The charge ordered antiferromagnetic insulator Pr0.6Ca0.4MnO3 transforms into a ferromagnetic metal in the absence of an external magnetic field (H) for B = Cr, Ni, Co, and Ru, whereas B = Fe and Al samples remain as antiferromagnetic insulators. It is found that the applied magnetic field induced an abrupt increase in the magnetization above a critical value of H (field-induced metamagnetic transition) in the paramagnetic state for B= Cr, Ni, and Co but not for B= Ru, which has the highest Curie temperature in the series (T-C = 205 K). The B = Co sample shows the maximum value of the magnetic entropy (-Delta S-m = 7.