Ultrastructural Characteristics of Collagen Tissue in Normal and Congenitally Dilated Ureter

Medel, Ricardo; Em, Quesada

doi:10.1159/000472529

Cited by 10 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This difference in muscle volumetric density may be due to a decrease or atrophy of musculature with age, which would explain the difference found between children and adults. In our study, the increase in volumetric density (Vv) of the smooth muscle may be due to hypertrophy of the muscle cells and some studies agree with this 8,11 . However, these studies did not determine when or how fast hypertrophy of the musculature occurs and if it returns to initial values once the obstruction is removed.…”

Section: Smooth Muscle Fiberssupporting

confidence: 84%

“…In a study that analyzed congenital megaureters in adults and children by transmission electron microscopy, it was observed muscular hypertrophy of the dilated part of the ureter 11 . Although these authors, as well as Hanna et al 8 , did not perform quantitative analyses, the muscular hypertrophy found was, in some ways, consistent with the results of our study.…”

Section: Smooth Muscle Fibersmentioning

confidence: 99%

“…Most studies compared normal and dilated ureters in infants with congenital disorders [5][6][7][8][9][10][11][12][13] . None of these studies assessed adults with dilated ureters resulting from acquired illnesses.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural changes of dilated pelvic ureters in adults

et al. 2014

View full text Add to dashboard Cite

PURPOSE:To perform a quantitative assessment of different types of pelvic ureter tissues with chronic dilation in adults, using stereological methods. METHODS:We analyzed fragments of dilated pelvic ureters obtained from 6 patients aged between 35 and 67 years (mean, 46 years) who underwent ureteral reimplantation surgery for different reasons. The obstruction duration ranged from 27 to 180 days (mean, 93 days). The control group included fragments of normal pelvic ureters obtained during nephrectomy in 7 kidney transplant donors (age: range, 25-51 years; mean, 36 years). The volumetric density of collagen in the ureter, elastic fibers, and smooth muscle fibers was assessed. RESULTS:The volumetric density (Vv) of collagen showed no significant difference between the two groups (control: 45.3 ± 6.1; dilated: 40.8 ± 6.9; P = 0.23). A statistically significant increase in Vv of elastic fibers was observed in the dilated ureters (control: 18.4 ± 1.2; dilated: 24.6 ± 5.4; P = 0.03). A statistically significant increase in the Vv of smooth muscle fibers was observed in the dilated ureter (control: 42.0 ± 6.0; dilated: 56.2 ± 6.1; P = 0.001). CONCLUSION:The chronically dilated pelvic ureters had significantly more elastin and smooth muscle contents than the controls.

show abstract

Section: Smooth Muscle Fiberssupporting

confidence: 84%

Section: Smooth Muscle Fibersmentioning

confidence: 99%

See 1 more Smart Citation

Structural changes of dilated pelvic ureters in adults

et al. 2014

View full text Add to dashboard Cite

show abstract

Collagen arrangements in ureter

et al. 1993

View full text Add to dashboard Cite

The collagen fibres of rabbit and human ureter were exposed by digestion with trypsin and hyaluronidase. The fibre structure was examined using an SEM and examples of the inner and outer fibre structures are shown together with the effects of different types of mechanical strain. An interesting difference between the arrangements of the inner fibres of human and rabbit was seen where the human ureter had a cross-ply structure while in the rabbit it was helical.

show abstract

Ureterovesical Junction Anomalies: Megaureters

Joseph¹

2010

Pediatric Urology

View full text Add to dashboard Cite

Ultrastructural Characteristics of Collagen Tissue in Normal and Congenitally Dilated Ureter

Cited by 10 publications

References 6 publications

Structural changes of dilated pelvic ureters in adults

Structural changes of dilated pelvic ureters in adults

Collagen arrangements in ureter

Ureterovesical Junction Anomalies: Megaureters

Contact Info

Product

Resources

About