Oral Presentation - 13
Can the opposite kidney findings be a warning for “losing ground” in infants under 1 year of age with unilateral hydronephrosis?
Mirzaman Hüseyinov 1, Rahşan Özcan 1, Şenol Emre 1, Nur Canpolat 2, Haluk Sayman 3, Sebuh Kuruğoğlu 4, Mehmet Eliçevik 1, Yunus Söylet 1, Sabri Nafiz Cenk Büyükünal 1, Haluk Emir 1
1 Istanbul University Cerrahpasa Medical Faculty Department of Pediatric Surgery Division of Pediatric Urology
2 İstanbul University, Cerrahpasa Medical Faculty, Department of Pediatric Nephrology
3 İstanbul University Cerrahpaşa Medical Faculty, Department of Nucleer Medicine
4 Istanbul University Cerrahpasa Medical Faculty, Department of Radiology
Aim: To assess the changes in normal opposite kidney in patients followed up for unilateral hydronephrosis and to investigate its association with dysfunction of affected kidney.Patients and Method: Records of patients younger than 1 year of age admitted to our clinic between 2005 and 2016 and diagnosed with ureteropelvic junction obstruction (UJO) were reviewed retrospectively. Patients’ ultrasonographic and scintigraphic findings for kidneys with UJO and normal opposite kidneys were compared. Findings: 111 patients in total were included in the study. Compensatory hypertrophy was developed in the healthy kidneys of 31 patients in the preoperative period. Compensatory hypertrophy was found to be associated with low function and/or reduced perfusion in the unhealthy kidney in 24 (74%) of these patients. 18 out of these 24 patients had mild hydronephrosis (PAP:5-14mm) present before compensation in their kidneys with compensatory hypertrophy. Mild hydronephrosis developed at a mean age of 3.2 months (range 1 - 8 months) and compensatory hypertrophy progressed at a mean age of 6 months (range 2 – 12 months). The average time from development of mild hydronephrosis on healthy side to surgery was 7 months (range 2 – 13 months).Deterioration in function and perfusion capability of the unhealthy kidney was present in the preoperative period in 7 patients out of these 18, who developed minimal hydronephrosis and compensatory hypertrophy. In 2 of the other patients, although no functional changes occurred due to mild hydronephrosis, function of the kidney reduced by 10% at the end of follow-up, while deterioration of perfusion was present 3 patients. Renal functions of these 18 patients continued to decrease also in the postoperative period, and the perfusion capabilities of 5 patients whose functions did not change were reduced. Results: In our study, mild hydronephrosis and compensatory hypertrophy developing in the healthy kidney of patients followed up for unilateral hydronephrosis was found to be associated with “losing ground” in affected kidney. Identifying mild hydronephrosis detected in normal kidney 4 months prior surgery decision, which is a finding that has not yet been defined in the literature, was evaluated as an early symptom of deterioration in the affected kidney. Comprehensive studies are needed on this subject.