BACKGROUND Nasopharyngeal angiofibromas are typically considered benign vascular neoplasms, with descriptions of high-grade sarcomatous change found only in lesions with prior radiotherapy. METHODS AND RESULTS We describe the first reported case of high-grade malignant change in a nasopharyngeal angiofibroma naive to radiation. A 45-year-old man presented with left-sided nasal congestion and ...

We report the 20-year results of Bonnin's modification of the Bristow-Latarjet procedure in 14 patients operated on by one surgeon. All but one patient had had traumatic dislocations. At review, the Rowe scores were excellent in five, good in eight and fair in one. The functional outcome was satisfactory, with a mean Constant-Murley score of 80 points (68 to 95), but 12 patients had restriction...

maximizing economic earnings is the most common goal in cut-off grade optimization of open-pit mining operations. when this is the case, the price of the product has a critical effect on optimum value of cut-off grade. this paper investigates the relationship between optimum cut-off grade and price to maximize total cash flow and net percent value (npv) of operation. in order to visualize this ...

OBJECTIVE This study aimed to evaluate the reproducibility of a new grading system for lumbar foraminal stenosis. MATERIALS AND METHODS Four grades were developed for lumbar foraminal stenosis on the basis of sagittal MRI. Grade 0 refers to the absence of foraminal stenosis; grade 1 refers to mild foraminal stenosis showing perineural fat obliteration in the two opposing directions, vertical ...

This study examined students’ grade expectations over the course of a semester. Students provided their expectations at 3 times: within the first week of the semester, midway through the semester, and within the week just prior to the final exam. Results demonstrate that expected grades decreased over the semester and that the rate of change interacted with students’ cumulative grade point aver...