Patent urachus accounts for up to 50% of cases in children, usually diagnosed in the neonatal period and due to the reflux from superior side of the bladder. In 30% of cases it may be associated to posterior urethral valves and urethral atresia [5]. In about 30% of cases an urachal cyst is present, consisting of a cystic cavity of the median umbilical ligament, closed off in its umbilical and vesical ends. An infected urachal cyst is the most usual presentation in the adult [2,6,7]. In the urachal sinus, presenting in up to 15% of cases, the apical segment of the urachus remains open and communicates with the umbilicus [8]. A vesicourachal diverticulum is more uncommon (3-5% of cases), which is an incomplete obliteration of the inferior portion of the median umbilical ligament that communicates with the vesical end [9,10]. In most cases these abnormalities are asymptomatic, usually giving off signs when infection befalls due to their remainders becoming overt [11]. The biggest problem with this kind of pathology is its atypical presentation, mimicking different signs and symptoms of seemingly usual urological problems, due to their close relation to neighboring structures, especially the bladder. Because of this and of the diagnostic tests findings, many times these abnormalities fall into the spectrum of urological cancer [12]. Urachal infection usually presents as pain, redness, warmth and purulent exudate, sometimes with clinical and analytical signs of systemic dissemination. The route of infection may be lymphatic, hematogenous or vesical. Thus, the choice of a specific antibiotic may be difficult due to the diversity of involved germs. The site of secretion may vary according to the level and degree of overture of the urachal lumen: the umbilicus in a urachal sinus; the bladder in a vesicourachal diverticulum; or both in a patent urachus. Intra-peritoneal rupture may be a serious complication due to the risk of peritonitis [13-15]. Imagiology demonstrate the complexity of this kind of pathology, because they may not allow for a clear diagnosis, showing solid and cystic components, and not able of distinguishing malignant