Biomedical subjects
M Barzilai
Publications and source records attributed to M Barzilai.
[Who are really the coauthors of a scientific article and why are there so many of them?].
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Isocratic non-aqueous reversed-phase high-performance liquid chromatographic separation of capsanthin and capsorubin in red peppers (Capsicum annuum L.), paprika and oleoresin.
A simple, rapid high-performance liquid chromatography method has been devised in order to separate and quantify the xanthophylls capsorubin and capasanthin present in red pepper (Capsicum annuum L.) fruits and preparations made from them (paprika and oleoresin). A reversed-phase isocratic non-aqueous system allows the separation of xanthophylls within a few minutes, with detection at 450 nm, using methyl red as internal standard to locate the various carotenoids and xanthophylls found in plant extracts. The selection of extraction solvents, mild saponification conditions, and chromatographic features is evaluated and discussed. The method is proposed for rapid screening of large plant populations, plant selection, as well as for paprika products and oleoresin, and also for nutrition and quality control studies.
Gallbladder pseudopolyp formation following percutaneous liver biopsy.
Following an unsuccessful liver biopsy in a 16-year-old girl in which only bile was obtained, a sonographic (US) study was performed. The findings were those of free fluid just adjacent to the gallbladder as well as a small intraluminal protrusion of the gallbladder wall. The US features of the gallbladder finding were consistent with a polyp. Gallbladder polyps are very rare in children, however, sporadic case reports do exist. An US study 24 h after the invasive procedure revealed complete regression of the free fluid; the gallbladder wall protrusion has disappeared. We suggest that the tip of the biopsy needle had penetrated the gallbladder wall and caused a bile leak. The needle penetration caused elevation of the inner wall layer at the entrance site, which was indistinguishable from the sonographic findings of a gallbladder polyp [1-4]
Gallbladder polyps in children: a rare condition.
Although gallbladder polyps are well documented in adults, only three cases in children have been reported in the literature. We present two pediatric cases in which gallbladder polyps were detected by ultrasound, confirming this as the imaging method of choice in diagnosing gallbladder disease.
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[Round pneumonia shadows in children suspected of indicating mediastinal tumors].
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[Coded radiologic reports--a two-edged sword].
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[Self-sonographic follow-up of bone refraction at a fracture site of the distal phalanx of the thumb].
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Orbitopalpebral emphysema--another hazard of air travel?
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Increased reflectivity of the pancreas in rare hereditary pancreatic insufficiency syndromes.
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The association between chronic renal disease and cone-shaped epiphyses in children.
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Renal cortical abscess in a gravid female: US and MRI documentation.
We report a case of renal cortical abscess in a gravid woman. The abscess was documented by US as well as by MRI. The development of a kidney abscess is extremely rare despite the fact that urinary tract infections are quite common during pregnancy. The limitations of the diagnostic work-up during pregnancy are emphasized.
A fibroepithelial urethral polyp protruding into the base of the bladder: sonographic diagnosis.
A case of congenital urethral polyp in a 10-month-old boy is presented. These rare congenital tumors can lead to urinary retention, hematuria, urinary tract infections, hydronephrosis and hydroureter. Traditionally the diagnosis was based either on voiding cystourethrography or cystoscopy. The sonographic features of these polyps have only been reported in a few cases in the past. This modality is not infrequently the imaging procedure of choice in the work-up of children with signs and symptoms related to the urinary system. In the case presented herein the polyp was demonstrated initially by sonography as a soft tissue mass arising at the base of the urinary bladder. The differential diagnosis of these lesions is presented.
Hypoechoic periportal encasement in Chédiak-Higashi syndrome.
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[The role of ultrasound in identification and localization of foreign bodies in the soft tissues].
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[Sonographic imaging of Ascaris lumbricoides].
The round worm, Ascaris lumbricoides, is one of the largest of the parasites that infest the human bowel. The worms usually develop in the jejunum and can reach several thousand in number, causing bowel obstruction, volvulus, intussusception, appendicitis and even bowel perforation with penetration into the peritoneal cavity. They tend to invade the bile and pancreatic ducts and may cause acute cholecystitis and pancreatitis. Ascaris lumbricoides can be detected by sonography. This imaging modality can be helpful in diagnosing the presence of the worms and in evaluating response to treatment. We present an 18-month-old girl in whom bowel worms were detected by sonography.