Because it is considered that there is a close connection between gustation and olfactation, and that a decline in the function of either sensation influences the other one, it would be useful to clarify the relation between gustatory and olfactory disorders in patients receiving cancer chemotherapy. Therefore, we investigated the frequency of gustatory and olfactory disorders in patients administered anticancer drugs at the Division of Outpatient Chemotherapy of Kanazawa University. Among 136 patients who consented to participate in the investigation, 75 patients (55%) complained of a gustatory disorder, and 26 patients (19%) complained of an olfactory disorder. The occurrences of olfactory disorder were significantly greater in patients who had gustatory disorder than in patients who did not. The expression frequency of gustatory disorders was significantly higher among those taking docetaxel (85%) when compared with patients on other regimens. Although not statistically significant, the incidence of olfactory disorder was higher in patients taking docetaxel (31%), irinotecan+l-leucovorin (l-LV)+5-fluorouracil (5-FU) (31%), l-oxaliplatin+l-LV+5-FU (28%), trastuzumab (23%), and weekly paclitaxel (22%). Medical staff should recognize that olfactory disorders are similar to gustatory disorders, as they both have adverse reactions induced by anticancer drugs.
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