Abstract
Background: Olfactory function in multiple sclerosis (MS) has not been extensively studied. Anecdotal cases describing disturbances in olfaction in MS have been reported; however, different investigations have yielded conflicting results. We per formed a controlled study using a standardized quantitative test of olfactory function to determine the occurrence of microsmia in MS.Methods: The University of Pennsylvania Smell Identification Test (UPSIT) was administered to sixteen patients with clinically definite MS and fourteen age- and sex- matched controls. Additionally, each patient and control was given a detailed ques tionnaire to ascertain subjective estimates of olfactory function. Patients and con trols with concurrent conditions associated with microsmia or anosmia were excluded from the study.Results: In the patient group, mean expanded disability status scale (EDSS) was 5.2 (range 1.0 to 8.5) and mean disease duration was 12.3 years (3 to 50). One patient had subjective microsmia. Mean UPSIT scor...
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