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Biomedical subjects

J Ormos

Publications and source records attributed to J Ormos.

At least 55 records · Page 3Linked to original sources
PubMed1986

Crystals in a jugulotympanic paraganglioma.

The morphologic features of a jugulotympanic paraganglioma are reported. The tumor showed the usual histology of paragangliomas. No sustentacular cells were identified. In the tumorous chief cells there were typical neurosecretory dense-core granules 60-180 nm in diameter. Granules averaging 400 nm in diameter were also observed, sometimes with a regular rhomboid core or crystallized content. Rhomboid crystals were seen in the cytoplasm in membrane-bound spaces and in telolysosomes. The crystals had a substructure consisting of alternating light and dark lines with a periodocity of 5-10 nm. Such crystals had not been reported previously in paragangliomas. The possible origin of the crystals is discussed.

Crystallization↗
PubMed1986

Incidence of nephrotic syndrome in patients with glomerulonephritis.

The occurrence of nephrotic syndrome was studied in different types of glomerulonephritis. In 284 consecutive adult cases the diagnosis was confirmed by the histological evaluation of percutaneous renal biopsy. Nephrotic syndrome was more frequent in minimal change glomerulonephritis, in focal sclerosis and in membranous nephropathy. The incidence of glomerulonephritis decreases, while the relative incidence of nephrotic syndrome increases with age. Glomerulonephritis is more frequent in men whereas the relative incidence of nephrotic syndrome is higher in women.

Adolescent↗
PubMed1984

Inhibiting effect of foetal renal antigen on leukocyte migration in human glomerulonephritis.

In 141 cases of glomerulonephritis confirmed by renal biopsy it was demonstrated that foetal glomerular basement membrane antigen caused a migration inhibition most frequently in minimal change glomerulonephritis. Cellular hypersensitivity was less common in membranous nephropathy, membranoproliferative (I-III) glomerulonephritis, IgA nephropathy and lupus nephritis. The correlation between LMT positivity and the occurrence of renal tissue IF activity was a linear one, but in one type, minimal change glomerulonephritis, there was no such correlation. The occurrence of LMT positivity does not show any considerable difference in glomerulonephritis with and without nephrosis.

Adolescent↗
PubMed1984

Arteriolar lesions in human renal biopsy material with special regard to the ultrastructural changes in the basal lamina network of the vascular wall.

The arteriolar changes in renal biopsy samples were studied by light and electron microscopy and immunohistologic observations. Arteriolar hyaline thickening was found to occur in virtually all renal diseases, regardless of whether these were accompanied by hypertension or not. Only amyloidosis and dense deposit glomerulonephritis were accompanied by specific ultrastructural arteriolar changes. The nonspecific "hyalin" was shown ultrastructurally to contain various components: accumulated basement membrane material, fine granular deposit (with filamentous or lipid details), and granulovesicular and threadlike membrane structures. Presumably the material constituting these structures originates partly from the blood and partly from elements of the vascular wall itself.

Arterioles↗