Bilateral lower lip mucoceles: cause of functional malocclusion in a three-year-old child

The case report of a three-year-old girl is presented, who had two nontender, bluish, fluctuant swellings diagnosed as superficial mucoceles present since the child was a few days old. The child had a unilateral crossbite with the mandibular midline shifted almost one tooth width to the left, a longstanding function adaptation producing malocclusion. The mucoceles were surgically removed, and the cross-bite disappeared.