Optional-depending on the results of the history, physical examination, and obligatory laboratory parameters-for differential diagnostic workup
- Gustometry (synonyms: taste test, taste test, taste test) – diagnostic procedure in otorhinolaryngology to check the sense of taste, for example, to detect nerve lesions.
- Computed tomography / magnetic resonance imaging of the skull (cranial CT or.cCT/cranial MRI or cMRI) – for suspected diseases of the central nervous system.
- Confocal biomicroscopy – imaging diagnostic tool in the study of the olfactory epithelium and peripheral sections of the taste organ.
- Contact endoscopy (KE) – this procedure is used to quantify the fungiform papillae (papillae/cm2) and examine the tongue epithelia after previous testing of local and overall taste ability. Structural changes can be detected in this way.
