RESUMO
Ranulas are cystic lesions in the floor of the mouth. Case reports published worldwide have been very few. They are formed either as retention cyst or as pseudocyst due to extravasation of mucus in the surrounding tissue. We report the case of a full term female neonate with a congenital ranula in the floor of mouth on left side. The swelling caused no discomfort or complication and hence no immediate intervention was required. The ranula was treated by aspiration using a wide bore needle and did not recur on 4 months follow up. Other methods of treatment include excision of ranula, marsupialization, cryosurgery, sclerotherapy. As many congenital cysts resolve or rupture spontaneously, they should be observed for potential resolution for several months in uncomplicated cases.