Voiding disorders result usually from functional disturbance. However, relevant organic diseases must be excluded prior to diagnosis of functional disorders. Additional tests, such as urinalysis or abdominal ultrasound are required. Further diagnostics is necessary in the presence of alarm symptoms, such as secondary nocturnal enuresis, weak or intermittent urine flow, systemic symptoms, glucosuria, proteinuria, leukocyturia, erythrocyturia, skin lesions in the lumbar region, altered sensations in the perineum. Functional micturition disorders were thoroughly described in 2006, and revised in 2015 by ICCS (International Children’s Continence Society) and are divided into storage symptoms (increased and decreased voiding frequency, incontinence, urgency, nocturia), voiding symptoms hesitancy, straining, weak stream, intermittency, dysuria), and symptoms that cannot be assigned to any of the above groups (voiding postponement, holding maneuvers, feeling of incomplete emptying, urinary retention, post micturition dribble, spraying of the urinary stream). Functional voiding disorders are frequently associated with constipation. Bladder and bowel dysfunction (BBD) is diagnosed when lower urinary tract symptoms are accompanied by problems with defecation. Monosymptomatic enuresis is the most common voiding disorder encountered by pediatricians. It is diagnosed in children older than 5 years without any other lower urinary tract symptoms. Other types of voiding disorders such as: non-monosymptomatic enuresis, overactive and underactive bladder, voiding postponement, bladder outlet obstruction, stress or giggle incontinence, urethrovaginal reflux usually require specialized diagnostics and therapy. Treatment of all types of functional voiding disorders is based on non-pharmacological recommendations (urotherapy), and such education should be implemented by primary care pediatricians.

Introduction and objectiveKidney abscess is one of the complications of the urinary tract infection. Gram (-) intestinal flora is considered the most common etiological factor in development of kidney abscess. The spreading of bacteria usually occurs via an ascending route. Currently, in the era of antibiotic therapies, the kidney abscess is a relatively rare complication.Material and methodsThe study aimed to analyse the prevalence, risk factors, clinical course of the disease, results of treatment, and the long-term consequences in pediatric patients with kidney abscess diagnosis.ResultsThe renal abscess was diagnosed in 8 out of 32,000 hospitalized children (0.00025%) (5 girls, 3 boys, average age 6 years). In 7 cases, the association with urinary tract infection was confirmed (87.5%). In all patients, the abscess was limited to the renal parenchyma and its diameter was below 50 mm; two patients had multiple abscesses. Three children (37.5%) had a history of urinary tract disease. All patients had increased levels of the inflammation markers but the renal function parameters were within the reference values. Five children (62.5%) presented clinical symptoms (fever, pain, dysuria); in 2 children (25%) the clinical course was chronic and oligosymptomatic. The sensitivity and specificity of ultrasound examinations (US) were 100% accurate in the diagnosis and monitoring of treatment. In all cases, antibiotic therapy was effective. Post-antibiotic treatment renoscintigraphy showed persistent post-inflammatory scars in 62.5% of cases.ConclusionsDuring 20 years of observations, kidney abscess was a rare complication of urinary tract infection. Most patients did not have any underlying risk factors. Ultrasound examination had high sensitivity and specificity in the diagnosis and monitoring of the treatment. Broad-spectrum, prolonged antibiotic therapy proved to be an effective treatment in all patients. However, after the abscess has been successfully healed, most patients required permanent nephrology care due to the presence of the post-inflammatory scars.