The<unk>  is thought to be caused by an ectopic portion of the submandibular salivary gland which causes the bone of the lingual cortical plate to remodel. Rarely, the<unk>  can be completely surrounded by bone, and this has been theorized to be the result of entrapment of embryonic salivary gland tissue within the bone. Similar, but rarer,<unk> s may be present in the anterior portion of the lingual surface of the mandible. These are not termed<unk> s which specifically refers to the posterior location. The anterior<unk> s may be associated with the sublingual salivary gland.
Stafne defect
Keyhole defect
Double aortic arch
Situs ambiguus
First arch syndrome
Pulmonary hypoplasia
Pulmonary agenesis
Pulmonary atresia