Agnathia.. Loss of upper or lower jaw in whole or in part. Lack of development of the middle and inner ear, zigzag bones, temporal bone, muscles and nerves

Agnathia:
- Any loss of upper or lower jaw in whole or in part.
The most common symptom is the absence of the head, ear, and ear on the affected side (the ear - jaw "bit and head" arises from the external fetal vein).
- This disorder is associated with the lack of development of the middle ear and the interior and the arches of the temporal and temporal bone, muscles and nerves.