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Pathology - Genitourinary anomalies
Renal agenesis: The absence of one or both kidneys. Bilateral renal agenesis is invariably lethal in gestation or immediately postnatally. Unilateral renal agenesis is typically asymptomatic, however it is frequently linked to further malformations of the genital tract.
Renal fusion • May encompass part or all segments of each kidney. The most prevalent type of renal fusion is the horseshoe kidney, characterized by the fusion of the lower poles of both kidneys into a singular renal mass located in the midline. • Patients are susceptible to blockage development.
Rotational anomalies • Arise from the inability of the renal pelvis to transition from an anterior orientation to a medial orientation. • May manifest in a typically normal kidney or coexist with renal fusion or ectopia.
Renal dysplasia refers to a kidney exhibiting aberrant nephric development. Unilateral cases result in renal hypertrophy and a flank mass during infancy, while bilateral cases are typically fatal. • The kidney may be significantly enlarged and cystic or diminutive and solid. • Histologically, the kidney exhibits aberrantly structured nephron formations, frequently accompanied by cystic alterations. The existence of fetal cartilage is a distinctive attribute. Pelviureteric junction blockage is a prevalent etiology of congenital obstructive uropathy. • Resulting from an inherent anomaly of the smooth muscle in the outflow tract wall at that location. • More prevalent in males. • Typically unilateral, with a higher prevalence on the left side. • May manifest in childhood with stomach discomfort.
Ureteral duplication is a prevalent anomaly characterized by the presence of two distinct renal pelves in the kidney, often associated with partial to total duplication of the ureter. In cases of complete reduplication, the upper ureter generally enters the bladder posteriorly at the standard location of the ureteric orifice on the bladder's trigone. The lower ureter typically joins the bladder laterally with a brief intramural segment, making it susceptible to vesicoureteric reflux.
Vesicoureteric reflux occurs when the vesicoureteric valve fails, resulting in the aberrant backflow of urine into the ureter during bladder contraction. • Increases susceptibility to urinary tract infections (UTIs) in youngsters. In severe instances, it may be compounded by intra-renal reflux and renal scarring, a condition referred to as reflux nephropathy.
Posterior urethral valves • Irregular mucosal folds in the posterior prostatic urethra resulting in obstructive uropathy. • Their presence is typically signaled by the detection of bilateral hydronephrosis on prenatal ultrasonography.
Cryptorchidism occurs when the testis does not descend into its typical position within the scrotum. Orchidopexy, which involves mobilizing and fixing the testis in the scrotum, should be conducted by the age of two years to maintain fertility. This condition is significant due to its correlation with an increased risk of testicular germ cell tumors.
Hypospadias • The predominant penile anomaly. • Characterized by the atypical positioning of the urethral meatus on the ventral aspect of the penis. • Typically an isolated defect, however there is a higher prevalence of cryptorchidism in males with hypospadias.
Renal agenesis: The absence of one or both kidneys. Bilateral renal agenesis is invariably lethal in gestation or immediately postnatally. Unilateral renal agenesis is typically asymptomatic, however it is frequently linked to further malformations of the genital tract.
Renal fusion • May encompass part or all segments of each kidney. The most prevalent type of renal fusion is the horseshoe kidney, characterized by the fusion of the lower poles of both kidneys into a singular renal mass located in the midline. • Patients are susceptible to blockage development.
Rotational anomalies • Arise from the inability of the renal pelvis to transition from an anterior orientation to a medial orientation. • May manifest in a typically normal kidney or coexist with renal fusion or ectopia.
Renal dysplasia refers to a kidney exhibiting aberrant nephric development. Unilateral cases result in renal hypertrophy and a flank mass during infancy, while bilateral cases are typically fatal. • The kidney may be significantly enlarged and cystic or diminutive and solid. • Histologically, the kidney exhibits aberrantly structured nephron formations, frequently accompanied by cystic alterations. The existence of fetal cartilage is a distinctive attribute. Pelviureteric junction blockage is a prevalent etiology of congenital obstructive uropathy. • Resulting from an inherent anomaly of the smooth muscle in the outflow tract wall at that location. • More prevalent in males. • Typically unilateral, with a higher prevalence on the left side. • May manifest in childhood with stomach discomfort.
Ureteral duplication is a prevalent anomaly characterized by the presence of two distinct renal pelves in the kidney, often associated with partial to total duplication of the ureter. In cases of complete reduplication, the upper ureter generally enters the bladder posteriorly at the standard location of the ureteric orifice on the bladder's trigone. The lower ureter typically joins the bladder laterally with a brief intramural segment, making it susceptible to vesicoureteric reflux.
Vesicoureteric reflux occurs when the vesicoureteric valve fails, resulting in the aberrant backflow of urine into the ureter during bladder contraction. • Increases susceptibility to urinary tract infections (UTIs) in youngsters. In severe instances, it may be compounded by intra-renal reflux and renal scarring, a condition referred to as reflux nephropathy.
Posterior urethral valves • Irregular mucosal folds in the posterior prostatic urethra resulting in obstructive uropathy. • Their presence is typically signaled by the detection of bilateral hydronephrosis on prenatal ultrasonography.
Cryptorchidism occurs when the testis does not descend into its typical position within the scrotum. Orchidopexy, which involves mobilizing and fixing the testis in the scrotum, should be conducted by the age of two years to maintain fertility. This condition is significant due to its correlation with an increased risk of testicular germ cell tumors.
Hypospadias • The predominant penile anomaly. • Characterized by the atypical positioning of the urethral meatus on the ventral aspect of the penis. • Typically an isolated defect, however there is a higher prevalence of cryptorchidism in males with hypospadias.
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