| Summary: | INTRODUCTION: Renal hypoplasia, is defined as kidney size under 2 standard deviations for age, although kidney is structurally normal. We aimed to evaluate the Doppler ultrasonography (US) findings of incidentally detected unilateral hypoplasic kidneys and the differences from contralateral kidneys in this study. METHODS: Twenty-three patients with unilateral renal hypoplasia, which incidentally detected while abdominal US examinations for any reason, were included in the study. For the hypoplastic and normal contralateral kidneys, the peak systolic velocity (PSV) of the main renal artery and the resistivity index (RI) and pulsatility index (PI) for the intrarenal arteries were measured with Doppler US. RESULTS: In the study, bilateral renal measurements obtained from 23 patients were used. PSV value of the main renal artery in hypoplasic kidneys was lower than that of normal kidneys and it was statistically significant (p<0,05). There was no statistically significant difference between RI and PI measurements between hypoplasic and normal kidneys (p>0,05).
The relation between renal long axis and renal parenchymal thickness with the PSV value of main renal artery was found to be statistically significant.
DISCUSSION AND CONCLUSION: Although the PSV values measured in the main renal arteries were lower in hypoplasic kidneys than in the normal side, there was no significant difference between normal and hypoplasic kidneys in terms of RI and PI values. We think that these results can be used to distinguish congenital unilateral hypoplasic kidneys from atrophic kidneys.
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