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Renal agenesis is a medical condition in which one (unilateral) or both (bilateral) fetal kidneys fail to develop.. Unilateral and bilateral renal agenesis in humans, mice and zebra fish has been linked to mutations in the gene GREB1L. [1]
A hydronephrotic kidney may present as a palpable abdominal mass in the newborn, and may suggest an ectopic ureter or ureterocele. In older children, ureteral duplication may present as: [citation needed] Urinary tract infection – most commonly due to vesicoureteral reflux (flow of urine from the bladder into the ureter, rather than vice versa).
Duplex kidney (Duplicated collecting system): A congenital condition where the kidney has two separate ureters (complete duplication) or a bifid ureter (partial duplication). In a coronal plane, both moieties may be visible, but in axial sections, one of the moieties may lack visible renal sinus structures, creating the faceless kidney sign.
Among children with one kidney, there are approximately twice as many males, whereas among children with three kidneys there are approximately 2.5 times more females. The same pattern is observed among infants with excessive number of ribs, vertebrae, teeth and other organs which in a process of evolution have undergone reduction—among them ...
“He was born with one kidney. He was the last of 10 children, and he liked to make the joke that they ran out of parts.” None of the sisters was a compatible match for his blood type.
Duplex kidney (Duplicated collecting system): A congenital condition where the kidney has two separate ureters (complete duplication) or a bifid ureter (partial duplication). In a coronal plane, both moieties may be visible, but in axial sections, one of the moieties may lack visible renal sinus structures, creating the faceless kidney sign.
The surface of the kidney has a pelvic recess and one or more transverse cortical grooves, presumed to be a failed formation of a renal lobe. The renal parenchyma next to the hypoplastic part of the kidney is seemingly normal; however, it can undergo hypertrophy, making the grooves more noticeable. [citation needed]
[10] [3] People with Herlyn-Werner-Wunderlich syndrome can be born with one kidney. [44] Urinary tract ultrasonography can be used to check for renal abnormalities in those with Herlyn-Werner-Wunderlich syndrome. [44] Other types of congenital anomalies can occur as well.