It is generally accepted that the first choice of treatment for spinal meningiomas is "radical" surgical removal. However, Simpson grade I removal is sometimes difficult, especially in cases with ventral dural attachment, because of the risk of spinal cord damage or the difficulty of dural repair after radical resection. In addition, there is no consensus on a surgical strategy for radicality, ...

OBJECTIVE Meningioma is the second most common primary central nervous system neoplasm. In contrast, chordoid meningioma is rare; due to the paucity of cases, little is known about its clinical features or treatment outcomes. The objectives of this study were to describe the clinical characteristics and outcomes for patients with chordoid meningioma. METHODS In total, 16 patients, with newly ...

Mammalian fossils from two principal collecting areas in the lower Hanna Formation of the Carbon Basin comprise three faunas, the Grayson Ridge, Halfway Hill, and Sand Creek faunas. The Grayson Ridge and Halfway Hill faunas are diverse, consisting cumulatively of 29 mammalian species, at least two of which are new. The faunas are approximately equivalent in age and are either latest lbrrejonian...

The goal of these notes is to give a proof of the Dual Ramsey Theorem. This theorem was first proved in “A Dual Form of Ramsey’s Theorem” by Tim Carlson and Steve Simpson, Advances in Mathematics, 1984. The proof presented here is the same proof given in the paper and follows much of the same notation and terminology. The main change is that we will explicitly use the notion of “infinite variab...

The Medical Journal of Australia ISSN: 0025-729X 21 April 2003 178 8 400-402 ©The Medical Journal of Australia 2003 www.mja.com.au History JOHN SIMPSON KIRKPATRICK, generally known as “Simpson”, is one of the most famous Anzacs of the Gallipoli campaign.1-3 From the Gallipoli landing on 25 April 1915 until his death 25 days later, Simpson and his donkey retrieved perhaps 300 casualties from the...

The full sibship reconstruction (FSR) problem is the problem of inferring all groups of full siblings from a given population sample using genetic marker data without parental information. The FSR problem remains a significant challenge for computational biology, since an exact solution for the problem has not been found. The new algorithm, named SIMPSON-assisted Descending Ratio (SDR), is devi...

BACKGROUND Simpson's paradox is sometimes referred to in the areas of epidemiology and clinical research. It can also be found in meta-analysis of randomized clinical trials. However, though readers are able to recalculate examples from hypothetical as well as real data, they may have problems to easily figure where it emerges from. METHOD First, two kinds of plots are proposed to illustrate ...