Table 2. Glossary of olfactory terms: qualitative disorders.

Distortion of illusion of smell	Olfactory hallucinations	Olfactory agnosia
Parosmia or dysosmia: distortion of the perception of an odor. Cacosmia: perception of unpleasant odors (coprosmia, when it is the odor of feces).	Phantosmia: smelling odors that are not there.	Incapacity to discriminate odors, with preservation of perceptual aspects of primary smell.
e.g. temporal lobe epilepsy and smell recovery after neuronal damage of any kind.	e.g. temporal lobe epilepsy, psychiatric disorders and during smell recovery after viral etiology.	e.g. cortical lesions and Korsakoff syndrome.