Abstract
We examined 10 patients with olfactory disorders caused by brain tumors during the period from October, 1988 to December, 1992. The results were as follows.
1. Seven of the 10 patients did not recognize olfactory disorderes, however no patients were normal. Although unilateral olfactory disorder is one of the important symptoms in intracranial diseases, unilateral olfactory test is not yet a routine test.
2. In the standard olfactory test, we regard the difference between detection threshold and recognition threshold of over 2.0 as dissociation. Five patients showed the dissociation. The dissociation might occur when the amount of information to the olfactory centers is in insufficient supply, or the third olfactory center is diseased.
3. In the intravenous olfactory test, the central olfactory disorders were characteristic in that the latent time was normal and the duration time was highly shortened.
