Co-existing Paraganglioma, Cholesteatoma, and Otomastoiditis With Overlapping Imaging Features: A Diagnostic Challenge.

Head and neck paragangliomas are rare neuroendocrine tumors arising from the autonomic nervous system. Imaging hallmarks of paragangliomas of the head and neck include an enhancing soft-tissue mass in the carotid space, jugular foramen, or tympanic cavity on computed tomography; a salt-and-pepper appearance on standard spin-echo magnetic resonance imaging; and an intense blush on angiography. Imaging studies depict the location and extent of tumor involvement, help determine the surgical approach, and predict operative morbidity and mortality.

Atypical Hepatic Hemangioma With Progressive Centrifugal Enhancement Pattern Mimicking Malignant Liver Lesion.

Hepatic hemangioma is a common benign vascular hepatic lesion with typical imaging features. However, hepatic hemangiomas with atypical radiological characteristics can sometimes be diagnostically challenging. Here, we report a case of an elderly patient with colonic adenocarcinoma who was incidentally found to have an atypical hepatic hemangioma showing a progressive centrifugal enhancement pattern instead of a typical centripetal pattern on contrast-enhanced computed tomography mimicking a malignant liver lesion.

Magnetic resonance angiography determined variations in the circle of Willis: Analysis of a large series from a single center.

Objective: The purpose of this study is to evaluate and describe the prevalence and patterns of arterial variants in the circle of Willis (CW) seen in noncontrast three-dimensional time-of-flight magnetic resonance angiography in a series of patients with cerebral vascular accidents (CVAs).

Materials And Methods: A descriptive study was undertaken in 200 patients who presented for screening for CVA in the Department of Radiodiagnosis and Imaging, St. John's Medical College Hospital, Bengaluru, from September 2014 to September 2016.

Among the fibers: A multimodality imaging review of intramuscular mass lesions.

The common presentations of patient complaints regarding the musculoskeletal system, such as pain, swelling, and restriction of movement, lead to the imaging discovery of various lesions often located in, or arising from, skeletal muscle in the region of interest. Knowledge of the patients' clinical history, laboratory parameters, and various imaging characteristics of the implicated lesions would assist the radiologist in coming to a timely, reasonably accurate conclusion about the etiology of the patient's complaints, the severity of disease, and in directing patient therapy.

Oxidative stress and antioxidant defense responses of Etroplus suratensis to acute temperature fluctuations.

Fishes are always exposed to various environmental stresses and the chances of succumbing to such stresses are of great physiological concern. Any change in temperature from the ambient condition can induce various metabolic and physiological changes in the body. The present study evaluates the effects of temperature induced stress on the antioxidant profile of Etroplus suratensis such as superoxide dismutase, catalase, glutathione peroxidase and lipid peroxidation.

Hepatic Pseudolesion in SVC obstruction - Technetium Sulfur Colloid Scan Equivalent of Quadrate Lobe Hot Spot Sign on Computerized Tomography.

An area of increased activity in segment IV of liver (quadrate lobe) on Tc-sulfur colloid (TSC) scans has been well documented in patients with superior vena cava obstruction. Similarly intense enhancement of the quadrate lobe in the arterial phase may be seen on computed tomography in patients of superior vena cava syndrome. We present this imaging finding in a case of malignant thymoma causing superior vena cava syndrome and discuss the physiological cause and importance of this sign.

Acute Yellow Phosphorus Poisoning Causing Fulminant Hepatic Failure with Parenchymal Hemorrhages and Contained Duodenal Perforation.

White phosphorus is well known as a potent hepatotoxin and a severe local and systemic toxin causing damage to gastrointestinal, hepatic, cardiovascular, and renal systems. It is used in the manufacture of matches, fireworks, rodenticide, and fertilizers. Death results due to acute liver failure.

Effect of Ethanol on Branchial Adenosine Triphosphatases in Oreochromis mossambicus (Peters).

The aim of this work was to determine the toxicity of ethanol in an aquatic system by means of bioassays with Oreochromis mossambicus (Peters) as a test organism. The study revealed changes in the gill ATPase activities. The results obtained indicated that ethanol brought about a decrease in the body weight, followed by significant inhibition on total ATPase, Na(+)/K(+) ATPase, Ca(2+) ATPase and Mg(2+) ATPase activities.

Effects of maternal vitamin A status on kidney development: a pilot study.

Nephron endowment ranges widely in normal human populations. Recent autopsy studies have drawn attention to the possibility that subtle congenital nephron deficits may be associated with increased risk of developing hypertension later in life. Since modest maternal vitamin A deficiency reduces nephron number in rats, we designed a pilot study to determine the prevalence of maternal vitamin A deficiency in Montreal (Canada) and Bangalore (India) and the usefulness of newborn renal volume as a surrogate for nephron endowment.

Lysosomal stability in Oreochromis mossambicus (Peters) on exposure to surfactants.

The three commonly used surfactants viz. anionic sodium dodecyl sulfate (SDS), cationic cetyl tri methyl ammonium bromide (CTAB) and non-ionic triton X-100 were toxic even at sub lethal levels (1 ppm for 30 days) to 0. mossambicus.