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Introduction: Renal abscesses are relatively rare in children, but they can lead to prolonged hospital stay and life-threatening complications. Scrutiny of the literature over the past two decades indicates the absence of a unified tactic for the treatment of purulent-destructive forms of pyelonephritis in children, while more and more articles are appearing in terms of a low -key approach to the treatment of renal abscess in children., Materials and Methods: From 2005 to 2019, we treated 59 children with the renal abscess. Among the patients were 22 (37.3%) boys and 37 (62.3%) girls. The location of the abscess on the right was determined in 30 (50.8%) children, on the left, in 29 (49.2%). The average age of the patients was 109 months. The median size of kidney abscess among all patients was 29 [21; 42] mm (range from 12 to 69 mm)., Results: The results of treatment were evaluated in the period from 3 months to 5 years. In 27 (45.8%) patients, conservative treatment gave a positive effect, while in 32 (54.2%) abscess puncture was performed under ultrasound guidance. The median hospitalization in patients after an abscess puncture was 15 [14; 18] days, against 13 [9; 17] days for children receiving only antibiotic therapy. The duration of hospital stay was significantly longer in the group of patients who underwent puncture (p=0.019). The effectiveness of conservative therapy was a lot lower in patients with a kidney abscess of more than 3 cm, 60% versus 31% (p=0.026). All 59 patients recovered completely, and none of them required an open surgery to drain a suppurative focus of a kidney or nephrectomy., Conclusion: Conclusion. Our experience confirms the literature data, indicating the need to use a conservative approach to the treatment of patients with the renal abscess as a first-line therapy. Identification of an abscess with a diameter of more than 3 cm in patients considerably increases the likelihood of using an abscess puncture with the absence of the efficacy of a conservative approach.