Many conditions can cause hematuria, but the differential diagnosis can be simplified with a systematic approach. We discuss the common causes of hematuria and how to evaluate it.

INTRODUCTION THE incidence of primary and secondary syphilis has shown a steady increase in Great Britain in the last decade, from a figure of 1,162 in 1970 to 1,543 in 1979 for England and Wales. The incidence in Northern Ireland has been somewhat more sporadic (Figure) but we have found, in common with our colleagues in the United Kingdom,' a tendency to forget these conditions in arriving at...

Adult intussusception is a relatively infrequent, but well documented entity in the Western surgical literature, where the majorities of cases is caused by tumors and require resection. In Africa and other tropical locations, however, other causes of adult intussusceptions predominate and must be considered. As Western trained surgeons increasingly volunteer in developing countries it is impera...

Linearizability criteria for systems of two cubically semi-linear second order ordinary differential equations (ODEs) were obtained by geometric means using real symmetry analysis (RSA). Separately, complex symmetry analysis (CSA) was developed to provide means to discuss systems of two ODEs. It was shown that CSA provides a class of linearizable systems of two cubically semi-linear ODEs. Linea...

We report the finding of restricted diffusion in an isolated abscess of the clivus and discuss the imaging differential diagnosis, with an emphasis on the usefulness of diffusion-weighted imaging.

A case of cherubism in a 9 year old boy with no familial history is presented. Clinical features, histologic appearance, radiographic findings, differential diagnosis and rationale for treatment is discussed.

Ectopic cervical thymic cysts are uncommon lesions and definitive preoperative diagnosis is not always possible. Surgical excision is recommended due to the small but possible chance of malignant degeneration in adulthood. We present a case of a nine-year-old boy with an asymptomatic lesion in his neck, discuss the differential diagnoses of such lesions and treatment considerations.

A novel method for the identification of differential item functioning (DIF) by means of recursive partitioning techniques is proposed. We assume an extension of the Rasch model that allows for DIF being induced by an arbitrary number of covariates for each item. Recursive partitioning on the item level results in one tree for each item and leads to simultaneous selection of items and variables...