A fluid-filled cyst usually surrounding the crown of an unerupted tooth; often involves incomplete enamel formation.
A fluid-filled cyst, manifested as a lump or swelling, can develop around the crown of a tooth that fails to erupt. This particular type of cyst has the potential to cause swelling or resorption (loss of tissue) of the neighboring tooth roots. Treatment typically involves extracting the affected tooth and surgically removing the cyst.