Case presentation :
An 18-year-old patient consulted in dermatology for an umbilical nodule that had been evolving for 2 months. Physical examination found an umbilical pyogenic granuloma (Figure 1) with a discrete oozing and pus discharge after manual compression. An involution abnormality of the urachus duct was suspected and an abdominal ultrasound confirmed the diagnosis by showing an infected urachal cyst. The patient was treated with antibiotics and referred for a surgical removal of the cyst.