Is fetal hydronephrosis a malformation?
Mar 03, 2023
Source: Cainiu Health
Dr. Lv Aiming
Introduction
Fetal hydronephrosis is generally not a malformation; it may be physiological or caused by pathological factors. Pathological causes might include congenital obstruction, chromosomal abnormalities, or other conditions. In addition, fetal hydronephrosis could also result from fetal genitourinary system disorders or genetic diseases. During pregnancy, expectant mothers should have regular prenatal checkups at the hospital.
Fetal hydronephrosis is generally not a malformation; it may be physiological or caused by pathological factors. Pathological causes could include congenital obstruction or chromosomal abnormalities.
I. Physiological Causes
Most cases of fetal hydronephrosis are physiological. Because the fetal bladder contains urine, pressure on the kidneys increases, which may lead to renal pelvis dilation and result in hydronephrosis. Typically, once the fetus excretes the urine, the hydronephrosis gradually resolves. Additionally, disordered rhythmic contractions of the ureter can also cause fetal hydronephrosis. As gestational time progresses and the fetus continues developing, the ureteral contraction rhythm gradually returns to normal, and the hydronephrosis resolves accordingly.
II. Pathological Causes
1. Congenital Obstruction
Congenital obstructions, such as ureteral narrowing or twisting, can prevent timely drainage of urine into the bladder, leading to hydronephrosis.
2. Chromosomal Diseases
If the fetus has chromosomal abnormalities, hydronephrosis may also occur. In severe cases, this can lead to fetal malformations. A comprehensive evaluation should be conducted at the hospital, and pregnancy termination may be considered if the condition is serious.
In addition, fetal hydronephrosis may also result from fetal genitourinary system disorders or genetic diseases. Pregnant women should attend regular prenatal checkups at the hospital throughout pregnancy.
