Metanephros

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metanephros

[‚med·ə′ne‚fräs]
(embryology)
One of the posterior of three pairs of vertebrate renal structures; persists as the definitive or permanent kidney in adult reptiles, birds, and mammals.

Metanephros

 

a paired excretory organ in reptiles, birds, mammals, and man that replaces the mesonephros in the course of embryonic development.

The uriniferous tubules of the metanephros form from the nonsegmented posterior part of the nephrotome; unlike the uriniferous tubules of the mesonephros, they begin at the malpighian corpuscles. The ends of the tubules of the metanephros open not into the wolffian duct, as in the mesonephros, but into the ureter, an outgrowth of it.

References in periodicals archive ?
Clusters of foamy macrophages are often seen in papillary RCC, metanephric adenoma, and mucinous and tubular spindle cell RCC; and psammoma body calcifications can be seen in type 1 papillary, chromophobe, and translocation RCCs, and metanephric adenoma.
Crossed renal ectopia is a rare entity detected incidentally in 20 to 30% of cases [4] and results from the aberrant migration and crossing ofthe midline by the metanephric blastema and the ureteral bud [5], usually occurring during the fourth to eighth week of gestation [5].
Upregulation of Wnt4, which mediates epithelialization of the metanephric mesenchyme, has been detected after exposure of mesenchymal stem cells to hypoxia [16].
The mean proximal tubular diameter in the metanephric tissue of the experimental group II was 37.07 [+ or -] 0.054 [micro]m, in group III was 30.30 [+ or -] 0.041 [micro]m, in group IV was 33.33 [+ or -] 0.077 [micro]m and in group V was 32.97 [+ or -] 0.85 [micro]m.
A case of vaginal clear cell adenocarcinoma complicated with congenital anomalies of the genitourinary tract and metanephric remnant without prenatal diethylstilbestrol exposure.
Metanephric duct also develops from the mesonephric urinary bladder (in part).
The researchers could then differentiate them further into cells expressing SIX2, SALL1, and WTI, important markers of the metanephric cap mesenchyme, a critical stage of kidney differentiation.
The researchers could then differentiate them further into cells expressing SIX2, SALL1, and WT1, important markers of the metanephric cap mesenchyme, a critical stage of kidney differentiation.
Serotype 2 preferred to infect the ureteric bud (UB) cells compared with metanephric mesenchyme (MM) cells, while serotype 8 showed ubiquitous infection ability to UB and MM cells (around the UB tips) (Figure 3).
The parietal epithelial cells and the podocytes originate from the metanephric mesenchyme and are identifiable at week 5 of gestation in humans 1].
Tufro, "VEGF spatially directs angiogenesis during metanephric development in vitro," Developmental Biology, vol.
Whereas Wilms' tumor is observed in young children (0-5 years) with a single renal mass, renal cell carcinoma, metanephric adenoma, solitary angiomyolipoma, and focal infections are observed in older children (after 5 years).