SUMMARY A study of the intramural nerve supply of the dilated ureters of children with meningomyeloceles shows a definite plexus surrounding each muscle bundle with isolated nerve cells scattered in between. These were seen at all levels. No difference is seen in the structure of the intrinsic supply in dilated ureters from that in normal controls. It is postulated that the abnormality of ureteric function is related to variable potentiation of the intramural neuromuscular plexus by the extrinsic supply.
SUMMARY A total of 183 rat embryos were examined for primary deformities of the renal tract. 50 of these were untreated normal animals and showed no malformation. 133 were trypanblue treated embryos which displayed 3 types of neurospinal deformity: myelocele with normal tail, myelocele with short tail, and short tail only. The majority of metanephric and cloacal deformities occurred in association with short tail and not with myelocele. It is suggested that the range of vertebral, cloacal and renal tract anomalies encountered could fit into one syndrome of caudal regression, the severity of deformity being related to the degree of response to a teratogenic insult. ZUSAMMENFASSUNG Deformierungen des Hamlraktes in Zusammenhang mit einer Myelodysplasie bei Trypan Blau‐behandehen Rattenembryos Insgesamt 183 Rattenembryos wurden auf primäre Deformierungen des Harntraktes untersucht. Davon waren 50 unbehandelte Normaltiere und zeigten keine Mißbildungen. 130 waren Trypan‐Blau‐behandelte Embryos, die drei verschiedene Arten neurospinaler Deformierung aufwiessen: Eine Myelocele mit normalem Schwanz, eine Myelocele mit kurzem Schwanz, und nur ein kurzer Schwanz. Die Mehrheit metanephrischer und cloacaler Mißbildungen trat in Zusammenhang mit dem kurzen Schwanz und nicht mit der Myelocele auf. Es wird angenommen, daß die Reihe vertebraler, cloacaler und der Mißbildungen des Harntraktes, die von den Autoren angetroffen wurden, in ein Syndrom caudaler Regression passen könnten, wobei die Schwere der Veränderungen vom Ausmaß der Reaktion auf eine teratogene Schädigung abhängt. RESUMEN Deformidades de vias urinarias asociadas con mielodisplasia en embriones de rata tratados con azul tripan Se examinó un total de 183 embriones de rata en busca de deformidades primarias del tracto renal. 50 de ellos eran animales normales no tratados y no mostraron ninguna malformation. 130 eran embriones tratados con azul tripan que mostraron tres tipos de deformidad neurospinal: mielocele con cola normal, mielocele con cola corta y únicamente cola corta. La mayoría de las deformidades metanefríticas y cloacales se dieron con asociación de cola corta y no con mielocele. Se sugiere que las anomalías vertebrales, cloacales y del tracto renal encontradas por los autores, podrían encuadrarse dentro de un síndrome de regresion caudal, estando la gravedad de la deformatión en relatión con el grado de respuesta a un insulto teratógeno.
Membranoproliferative glomerulonephritis forms a small distinctive group among patients with renal disease. This report considers 50 such patients, 26 children and 24 adults. Follow-up indicated a chronic progressive course. All showed characteristic appearances on needle-biopsy. These consisted of enlargement of tufts, variable lobularity, and especially a combination of mesangial expansion coupled with diffuse capillary wall thickening. The mesangial enlargement was due to mesangial cell proliferation and increase in matrix. The latter was fibrillary on light microscopy and had basement membrane-like consistency on electron microscopy. The mesangial material appeared to extend around the lumen of the capillaries between basement membrane and endothelial lining. Thus on electron microscopy the capillary walls were thickened due to subendothelial layers of basement membrane-like material, islands of cytoplasm, and irregular thickening of lamina densa. In early biopsies the capillary wall thickening was not present in all loops. The degrees of proliferation and mesangial increase are variable and where the former is slight the glomeruli may, on light microscopy, give an appearance of epimembranous nephropathy, but the location of the subendothelial aggregations is characteristic in membranoproliferative glomerulonephritis. The degree of lobularity, the tubular and interstitial changes, and the occurrence of 'fibrin cap' lesions were probably dependent on the severity and stage of the disease process, and all the features were well demonstrated on light microscopy of ultra-thin silver-stained sections of epon-embedded biopsy material. Light Microscopy of Epon-embedded Kidney Biopsies.
SUMMARY A quantitative histological study of the muscle and connective tissue in 50 bladders from children with spina bifida and myelomeningocele is described. No correlation was found between age or level of the overt myelomeningocele and the amount of muscle present in the bladder fundus. Clinical and histological correlation was seen best in those children with gross bladder disease. RÉSUMÉ Une étude histologique quantitative du muscle et du tissu conjonctif de 50 vessies d'enfants avec spina bifida et myéloméningocèlest décrite. I1 n'a pas été noté de corréations entre l'âlge et le degré de couverture du myéoméningocèle et la quantité de muscle présente dans le bas fond vésical. La corrélation entre les données cliniques et histologiques a surtout été notée chez les enfants présentant une maladie de grosse vessie. ZUSAMMENFASSUNG Eine quantitative histologische Untersuchung des Muskel‐und Bindegewebes von 50 Harnblasen wird bei Kindern mit Spina bifida und Myelomeningocele beschrieben. Zwischen dem Alter und der Höhe der offenen Myelomeningocele einerseits und der Menge der im Blasenfundus vorhandenen Muskulatur andererseits fand sich keine Beziehung. Die klinische und die histologische Übereinstimmung war bei Kindern mit schweren Erkrankungen der Harnblase am deutlichsten.
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