Oral lymphangioma is a benign hamartomatous proliferation of lymphatic channels in the oral cavity. Most lymphangiomas affect children and young adults. Lymphangiomas have a predilection for the tongue, where they cause macroglossia.

In African-American neonates (particularly females), lymphangiomas occur on the alveolar ridge. They are essentially lymphangioma circumscriptum and will resolve spontaneously. Lesions are painless.