In this paper, we obtain several nonexistence results for abelian Hadamard diier-ence sets. In particular, we prove that there are no Hadamard diierence sets in abelian groups G = Z 2 Z 2 P , where jPj = p 2 , is odd and p is a prime congruent to 1(mod 4). Also we give a detailed proof for a connection between certain reversible Hadamard diierence sets and projective three-weight codes which wa...

BACKGROUND Posterior reversible encephalopathy syndrome is a potentially reversible clinicoradiologic syndrome characterized by headache, mental confusion, visual disturbances and seizures associated with posterior cerebral lesions on radiological imaging. Prompt treatment of this condition is mandatory to avoid severe irreversible complications. CASE PRESENTATION We report a 9-year-old boy w...

OBJECTIVE To describe a patient with reversible posterior leukoencephalopathy syndrome following the administration of bevacizumab (Avastin), a monoclonal antibody against vascular endothelial growth factor. DESIGN Case report/literature review. SETTING University hospital. PATIENT A 52-year-old man receiving chemotherapy for stage IV rectal carcinoma. RESULTS Clinical and radiographic ...

INTRODUCTION Posterior reversible encephalopathy syndrome is a clinicoradiologic entity characterized by headache, seizures, decreased vision, impaired consciousness and white matter oedema in bilateral occipitoparietal regions. Hypertensive encephalopathy, eclampsia, immunosuppressive/cytotoxic drugs, organ transplantation, renal disease, autoimmune diseases and vasculitides are reported risk ...

Posterior reversible encephalopathy syndrome (PRES) is a clinico-radiological syndrome characterized by a headache, seizures, altered mental status and visual loss and characterized by white matter vasogenic edema affecting the posterior occipital and parietal lobes of the brain predominantly. This clinical syndrome is increasingly recognized due to improvement and availability of brain imaging...

Posterior reversible encephalopathy syndrome (PRES) [1, 2] is a clinicoradiological entity that was well described by Hinchey et al. [3] in 1996 based on 15 cases, shortly after two other small case-series were published [4, 5]. This condition has been designated by a variety of names (reversible posterior leukoencephalopathy syndrome, reversible posterior cerebral edema syndrome, and reversibl...