RESUMEN
Objetivo: descrever um caso de hipercalciúria associada a hematúria microscópica que teve disúria como queixa inicial. Descrição: escolar de 5 anos procurou o serviço de emergência com queixa de disúria. Os exames laboratoriais iniciais revelaram a presença de hematúria microscópica persistente e, durante a investigação ambulatorial, confirmara-se os diagnósticos / Objective: to report a case of hypercalciuria associated to microscopic hematuria in which dysuria was the initial complaint. Description: a five-year-old child sought the pediatric emercy service with dysuria. Initial laboratory exams revealed microscopic hematuria and the child was referred to the outpatient clinic, where the diagnosis of idiopathic hypercalciuria associated to hyperuricosuria was confirmed..