Phantosmia is classified as an olfactory disorder. It refers to the perception of odors in the absence of a stimulus source[^1].
Neurosurgical relevance
Phantosmia is particularly relevant to neurosurgery in connection with the following disease entities:
Temporal lobe epilepsy (olfactory aura preceding a seizure)
Brain tumors, particularly in the region of the of the temporal lobe, of the frontal lobe or of the olfactory system