Studying The Prevalence of Renal Pyelectasis in the Second Trimester Ultrasound Screening in Iranian Mother’s Fetuses and their follow up after Birth
Kobra Mohammadi, Elham Keshavarz, Zahra Dehghani and Roya FallahianDepartment of Radiology, Mahdieh Hospital, Shahid Beheshti University of Medical Science, Tehran, Iran.
Corresponding Author E-mail: elhamkeshavarz@yahoo.com
Abstract: Pyelectasis (a rise in the anteroposterior diameter of renal pelvis more than 4 to 10 mm) can increase the possibility of disorders such as amniotic fluid problems and result in urinary tract abnormalities including ureteropelvic junction obstruction (UPJO). Pyelectasis is also loosely associated with chromosomal syndromes including trisomy 13, 18 and 21. The present research seeks to study the prevalence of renal pyelectasis in the second trimester ultrasound screening in the Mother’s Fetuses resorting to Mahdiye medical center over the period of 2014 to 2016 and their follow up after birth.In this research, all mothers who had resorted to Mahdiyeh Hospital of Tehran for the second trimester ultrasound screening from 2014 to 2016 were studied. Neonatal’s information after their birth in terms of affliction with major trisomy and renal problems and diseases was also studied and recorded. Finally, the prevalence of pyelectasis and its correlation with urinary tract abnormalities including UPJO and chromosomal syndromes was measured.Mothers aged 23 to 37 with an average of 29.67 ± 4.382 years. The prevalence of pyelectasis among the fetuses studied was 3.6% (36 cases) while this number for prevalence of urinary tract abnormalities diagnosed after birth was 0.2% (2 cases of UPJO) and all of them were suffering from pyelectasis and their mothers were older than 35. The level of FPR, PPV, sensitivity and specificity of pyelectasis disorder to be diagnosed with UPJO abnormalities was 3.4, 5.5, 100, and 96.6% respectively. Statistical analyses failed to show any significant difference caused by gender in terms of affliction with UPJO (P-value>0.5). A statistically significant difference was also observed between fetuses with UPJO and normal fetuses in terms of the number of pyelectasis (P-value < 0.5). A review of the results showed a higher frequency of pyelectasis among male fetuses than their female counterparts. Although this research failed to find any correlation between pyelectasis and chromosomal disorders, this complication may increase the possibility of affliction with urinary tract abnormality.
Keywords: Renal Pyelectasis; UPJO; Congenital Renal Anomalies Back to TOC