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Biomedical subjects

B Ondrus

Publications and source records attributed to B Ondrus.

At least 19 recordsLinked to original sources
PubMed1990

[Primary adenocarcinoma of the esophagus].

The presented analysis of a patient treated at the 1st Surgical Department of the Teaching Hospital in Bratislava meets the criteria for being classified as primary adenocarcinoma of the esophagus, whose characteristics are described in the paper. Primary adenocarcinomas of the esophagus occur rarely and constitute only about 0.5% of large series of esophageal malignancies. The tumor is not connected with the gastric mucosa, being separated from it by the normal mucosa of the esophagus, and it is not a metastasis. The patients suffer from late not marked dysphagia. The endoscopic and histologic findings are frequently misleading since the mucosa above the tumor is usually intact.

Adenocarcinoma↗
PubMed1989

[Metastasizing melanoma].

The complexities of diagnosing melanoma metastases are discussed. More accuracy can be attained with the aid of USG, CT, NMR and scintiscans of the liver. The LDH test appears to be the most effective in cases of metastases developing in the liver. A case of melanoma metastases in the gallbladder is analyzed.

Gallbladder Neoplasms↗
PubMed1989

[Factors affecting the recurrence of epithelial tumors of the urinary bladder].

Of the 178 patients with superficial tumors of the urinary bladder followed up over minimally three years from the onset of treatment, 137 (77%) developed relapse of the tumor. Comparison of anamnestic data and objective examination findings in patients with and without relapses yielded a statistically significant probability of relapses in patients with multiple tumors, in tumors with an increased number of cell layers, and in tumors with infiltration of the lamina propria. Patients presenting with any of these features are at risk of relapses and require prophylactic treatment.

Female↗
PubMed1986

Formation of calcium oxalate urolithiasis in experiment and its inhibition by pyridoxine and magnesium.

Possibility of application of experimental model of calcium oxalate urolithiasis to the study of some medicament actions useful in prevention of calcium oxalate urolithiasis in men has been examined in animal experiments. Inhibition effects of pyridoxine and magnesium in formation of calcium oxalate stone formation have been proved. Administration of pyridoxine and/or magnesium to experimental animals inhibited formation of incrustations on renal papillae. Administration of nothing but magnesium lowered considerably also frequency of nephrocalcinosis occurrence. Good reproducibility of applied model of calcium oxalate urolithiasis creates conditions for further experimental study of this kind of urolithiasis. In the previous series of experiments (4) we tiped out an experimental model of calcium oxalate urolithiasis in animals well reproducible in our conditions. In the following period we were interested, whether the created model can be applied to verification of efficiency and further study of some medicaments affecting this kind of urolithiasis. At present, pyridoxine and magnesium are mode widely used for prevention of calcium oxalate urolithiasis in the clinical practice. Therefore, we decided to use the possibilities of the evaluated experimental model for the study of their inhibition effects. The results of experiments are presented in this paper.

Animals↗
PubMed1984

Malignant Leydig-cell tumour of testis.

A rare case of a malignant Leydig-cell tumour of the testis in a 26-year-old patient, with radical orchiectomy from an inguinal incision is described. Although the results of AFP, HCG, biochemical, X-ray, lymphographic and scintigraphic examinations were negative, the first metastases into the lungs appeared one year after the operation. Combined cytostatic treatment, polychemotherapy and X-ray therapy proved ineffective. The patient died of multiple metastases 28 months after the surgical intervention.

Adult↗
PubMed1980

[Rhinophyma].

Explore the source record for details and available documents.

Aged↗
PubMed1977

[Ultrastructure of the red pulp of the spleen in various thrombocytopenias].

The authors describe 10 cases of samples of spleen tissue obtained from patients with various thrombocytopenias which had been subjected to electron microscopical examinations. In splenomegalies associated with liver cirrhoses a certain proportion of platelets accumulated in the spleen, whereas others were ingested by macrophages. No significant polymorhism of the platelets was observed. In cases of idiopathic thrombocytopenic purpura marked polymorphism of the platelets as regards size and structure was observed. The platelets also showed a concoisuous relation to the polymorphonuclear laucotytes. The alterations of the inner structure of the platelets could not be regarded as specific, because they were also found in lymhogranuloma.

Humans↗