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Biomedical subjects

Y Wagner

Publications and source records attributed to Y Wagner.

At least 19 recordsLinked to original sources
PubMed2001

Prevalence of short-segment Barrett's epithelium.

BACKGROUND/AIMS: The incidence of adenocarcinoma of the oesophagus has increased. Its major risk factor is Barrett's epithelium of which the sine qua non is microscopically diagnosed intestinal metaplasia. Short segment Barrett's epithelium may often be overlooked during routine endoscopy. In routine biopsies taken from normal-appearing mucosa of the distal oesophagus, the reported rates of short segment Barrett's epithelium in the distal oesophagus reached 36%. We compared these rates with the results obtained in a community hospital in Israel. METHODS: Consecutive patients undergoing oesophagogastroduodenoscopy were enrolled. Biopsy specimens taken from cardia, oesophagogastric junction and 2 cm above the oesophagogastric junction were stained with haematoxylin & eosin and Alcian blue. RESULTS: There were 112 study patients (mean age +/- SD 48. 9+/-18.3 years, 51.8% males). Nine (8.04%) patients had intestinal metaplasia (according to specimen from 2 cm above oesophagogastric junction), and symptoms of gastro-oesophageal reflux were found in only four (44.4%) of them. Of these nine patients, six (6.66%) had normal-appearing mucosa and three (3.33%) had macroscopic Barrett's epithelium. Alcian blue staining revealed two patients with intestinal metaplasia that haematoxylin & eosin staining had missed. CONCLUSION: We found an 8% prevalence of intestinal metaplasia compared to 18-36% reported in the literature. We also determined that the added advantage of routine biopsy was 5.4%.

Adenocarcinoma↗
PubMed1999

[Cytokeratin and p53 expression of odontogenic cysts].

The histopathologic diagnosis of odontogenic cysts is based mainly on the morphological nature of the epithelial lining of cysts and their origin. We used the international histologic classification set up by the World Health Organisation in 1992. The aim of this study was to investigate the differentiation of various types of cyst using an immunohistochemical technique rather than by conventional morphological assessment. A standard immunocytochemical method (APAAP method), applying anticytokeratin monoclonal antibodies and a p53 antibody, was used for the diagnosis of odontogenic cysts. A total of 57 jaw cysts were diagnosed according to clinical, radiological and pathological criteria as radicular cysts (20), dentigerous cysts (20) and keratocysts (17). The results proved that cyst type can be distinguished by the pattern of staining using the monoclonal antibodies CK7, CK19, CK20 for cytokeratins and the clone DO-7 for the p53 protein. Staining with the monoclonal antibodies CK7 and CK20 did not distinguish type. CK19 was not detected in keratocysts and p53 was only expressed in keratocysts. This may prove to be diagnostically useful for the more precise distinction between different cyst types.

Epithelium↗
PubMed1997

Comparison of various Helicobacter pylori detection methods: serology, histology and bacteriology.

The current gold standard test for diagnosis of Helicobacter pylori involves histological staining and/or urease testing of antral biopsy specimens. However, these methods are invasive, and alternative non-invasive methods, i.e. the urease breath test and serological tests, are available. The test for H. pylori-specific serum immunoglobulin G (IgG) is now available commercially. The aim of this study was to compare the gold standard tests for diagnosis of H. pylori to the non-invasive method of detecting IgG antibody in the serum. Two hundred and twenty-five (225) subjects were tested for H. pylori by histological staining, urease testing, direct microscopy of antral biopsy specimens and quantification of serum IgG antibody. The population examined was divided into 2 groups--a group of 52 patients with no gastrointestinal symptoms and a group of 173 patients with dyspepsia. Out of 173 dyspeptic patients, 22 (12.7%) were false-positive to H. pylori. Out of 52 non-dyspeptic subjects, 30 (57.7%) were false-positive (p < 0.0001). The sensitivity and specificity were 91.6% and 51.7%, respectively. The specificity and positive predictive value increased by approximately 30% when the subjects examined were in the younger age group (< 30 years), while the sensitivity and the negative predictive value did not change significantly. This study indicates that serological testing is not recommended for diagnosis nor is it recommended for follow-up treatment, especially among the older age group (> 30 years).

Adolescent↗
PubMed1996

[The buried gastrostomy bumper syndrome].

The buried gastrostomy bumper syndrome is one of the rare complications of PEG (percutaneous endoscopic gastrostomy) insertion. It develops when there is a combination of a rigid bumper and a tension build-up between internal and external bumpers. This condition is manifested by complete occlusion of the internal opening of the gastrostomy by mucosa, making it impossible to feed the patient. We report a case in which the PEG was inserted a year prior to the appearance of this rare complication. It was embedded beneath the gastric mucosa and we had difficulty in removing it to insert a new PEG. The bumpers are anchor-like attachments to each end of the gastrostomy, which keep it stationary. The rigid bumper is an integral part of the gastrostomy. However, a "soft" bumper has been developed, but its costliness has restricted its use. In our case the gastrostomy was removed with the aid of the cutting wire of a sphincterotome in light contact with the external tissue.

Female↗
PubMed1995

Cardiorespiratory effects of premedication for children.

Cardiovascular and respiratory effects of pediatric preanesthetic premedication have received only minimal attention, probably because most children tolerate such drugs without apparent ill effect. In children with congenital heart disease or other serious illness, there is often reluctance to use premedication. We sought to determine whether different premedication regimens produced significant cardiorespiratory effect. A randomized prospective study of the cardiovascular and respiratory effects of different oral, nasal, and rectal premedication regimens was conducted. Fifty-eight young children (average age 2.7 yr) were studied. Oral meperidine (3 mg/kg) with pentobarbital (4 mg/kg) decreased heart rate, mean arterial pressure, cardiac index, respiratory rate, and oxygen saturation. Stroke volume was maintained. Nasal ketamine (5 mg/kg) with midazolam (0.2 mg/kg) produced no significant cardiovascular or respiratory effects. Rectal methohexital (30 mg/kg) increased heart rate with a coincident decrease in stroke volume but had no other positive or negative cardiac or respiratory effect. This information documents disparate cardiorespiratory effects of different preanesthetic medications in normal children.

Administration, Intranasal↗
PubMed1995

The effect of the Gulf War on upper-gastrointestinal bleeding.

Upper-gastrointestinal bleeding may be related to tension or fear, which are commonly aggravating factors in digestive diseases. A survey was made of patients living in and around Hadera (located in Israel's central coastal region) during the Gulf War (January 18 through February 28, 1991) who suffered from upper-gastrointestinal bleeding; they were compared with patients seen during 1990 and 1992-1993 at the same time of the year. We found no appreciable difference in the rate of upper-gastrointestinal bleeding during the analogous periods covered in the survey.

Adult↗
PubMed1995

The role of Helicobacter pylori in children with recurrent abdominal pain.

OBJECTIVES: Our major goals in this study were to determine the prevalence of Helicobacter pylori among Israeli children with recurrent abdominal pain and to establish whether a link exists between eradication of Helicobacter pylori and the recovery from abdominal pain. The alternative target was to examine whether the serological test can replace endoscopy in children. METHODS: Upper gastrointestinal endoscopy was performed in 80 children with recurrent abdominal pain. During endoscopy, antral biopsies were taken and sent for histological and bacteriological examination. RESULTS: The prevalence of H. pylori, which was indicated by Gram stain and urease test, was 54%. The positive cases were treated with bismuth combined with amoxycillin and metronidazole. Two months after completion of the treatment, 34 patients were reexamined. Twenty-nine of them (85%) became symptom free, and five (15%) remained symptomatic. These five children were retreated, and they also became symptom free. Eight months after completion of treatment, all 34 patients were reexamined and found to be asymptomatic. CONCLUSIONS: We found a high prevalence of H. pylori (54%) among Israeli children with recurrent abdominal pain; we also found that symptoms were effectively and significantly reduced by the eradication of H. pylori. The endoscopic examination cannot be replaced by serological test.

Abdominal Pain↗
PubMed1988

Studies of manometric abnormalities of the rectoanal region during defecation in constipated and soiling children: modification through biofeedback therapy.

Anorectal manometry was performed on 12 normal children and 18 patients suffering from constipation and soiling. In both groups, the results of the rectoanal inhibitory reflex and the squeezing anal pressure were similar. The pressure recording in all the normal children showed that the anal canal relaxed during defecation. Fourteen (78%) constipated children closed the anal canal while straining by contracting the anal sphincter. This paradoxical contraction appears to be the cause of chronic constipation. Twelve children with paradoxical anal closure were treated by biofeedback therapy. The results show that all these children were successfully conditioned to relax their anal sphincter during defecation. This therapy improved their bowel habits and relieved them from constipation and soiling. It is proposed that the paradoxical anal closure itself is the result of a self-conditioning process. In this process, the patient learns to paradoxically contract the external anal sphincter in response to the urge and the act of defecation. Biofeedback therapy seems to be the appropriate treatment in such cases.

Anal Canal↗
PubMed1986

Chediak-Higashi syndrome. Expression of the cytoplasmic defect by in vitro cultures of bone marrow progenitors.

Studies on proliferation and differentiation of granulocyte-monocyte progenitor cells in Chediak-Higashi syndrome (CHS) were done on a 1-month-old patient, using the soft-agar bone marrow culture technique. The number of granulocyte-macrophage colony-forming cells (GM-CFC) was markedly increased, but with a normal distribution into granulocyte, macrophage, or mixed colonies. Morphologic, cytochemical, and ultrastructural studies showed that 70% of the colonies consisted of cells with giant lysosomes typical of CHS, and in the remaining 30% abnormal cells were not detected. The supply of granulocyte-macrophage colony-stimulating factor (GM-CSF) by the patient's peripheral blood leukocytes was markedly decreased. Inhibition of normal in vitro granulopoiesis by the patient's lymphocytes or serum was not demonstrated. It appears that granulocyte progenitors in CHS proliferate normally, or even in excess, probably in response to intramedullary destruction of granulocytes. The majority of the progenitors are intrinsically defective and give rise to colonies that contain the abnormality. In others the defects are unidentifiable, probably due to the immaturity of the specific fusion process of the cytoplasmic granules. The abnormal leukocytes in CHS are also defective in their capacity to provide GM-CSF, and this may account in part to the overt neutropenia. These studies demonstrate that the basic cytoplasmic abnormalities of the granulocytes and monocytes in CHS are embedded in the granulocytic-monocytic committed stem cell.

Bone Marrow↗
PubMed1983

Strongyloidiasis in infancy. Case report and review.

A 15-month-old child with extreme failure to thrive due to intractable diarrhea since the age of 20 days was found to have live Strongyloides larvae in aspirated duodenal juice. Larvae were seen embedded in crypts of jejunal mucosa obtained by peroral biopsy. Following treatment with thiabendazole, a dramatic recovery ensued. The pathophysiology and clinical spectrum of strongyloidiasis is reviewed and the importance of its recognition stressed.

Biopsy↗
PubMed1981

Mycoplasma pneumoniae infection presenting as acute rheumatic fever.

We describe five children in whom symptoms and signs fully consistent with a diagnosis of acute rheumatic fever arose in association with infection by Mycoplasma pneumoniae. With the decline of streptococcal disease as a causative agent of acute rheumatic fever, other etiologic possibilities capable of reproducing the clinical syndrome - especially Mycoplasma pneumoniae - should be considered, as this may have therapeutic and prognostic implications.

Blood Sedimentation↗
PubMed1979

Candida osteomyelitis as a complication of parenteral nutrition in an infant. Successful treatment with flucytosine.

Hematogenous Candida osteomyelitis is described in a two-month-old infant, as a complication of Candida septicemia which occurred during a parenteral hyperalimentation regimen. Treatment with flucytosine led to full recovery. The scarcity of reports on hematogenous Candida osteomyelitis in infants, despite an increased incidence of Candida septicemia, and the non-specific symptomatology which the disease may assume in this age group, indicate the need for greater awareness of this complication. Flucytosine is an antifungal drug which can also be given by mouth and carries relatively low toxicity. We found flucytosine to be extremely effective in the treatment of disseminated infantile Candida osteomyelitis.

Administration, Oral↗