Optional medical device diagnostics – depending on the results of the history, physical examination, laboratory diagnostics, and obligatory medical device diagnostics – for differential diagnosis.
- Conventional radiography of the skull or computed tomography of the skull (cranial CT, cCT) – for suspected injuries or neoplasms.
- Sialography (X-ray contrast imaging of the salivary glands) – if sialolith (salivary stone) is suspected.