Cystic hygroma.
D000328:Adult; D002675:Child, Preschool; D006258:Head and Neck Neoplasms / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008202:Lymphangioma / Q000473:pathology* / Q000601:surgery; D014062:Tongue Neoplasms / Q000473:pathology / Q000601:surgery