Prognosis of the eighteen cases of benign paroxysmal positional vertigo, which were exmined for a long time, was evaluated on the base of the recurrence of vertiginous attack, the period of the continuity of the vertiginous attack and the continuity of the symptoms (slight floating sensation, headache, etc) without vertigo.
1) Four cases (22%) had the recurrence of the vertiginous attack ( =Group IV).
1. Clinical findings (including equiliblium function test, audiogram, and s o on)revealed no difference between Group IV and others (Group I III).
2. Two cases out of three cases with history of head trauma had the r ecurrence of vertiginous attack.
2) Seven cases had the continuity of the symptoms (slight floating sensation, headache, etc) without vertigo ( =Group III).
1. Accompanying symptoms on the vertiginous attack were noted in four cases (57%) of Group III.
2. Unsociable or ner v ous character was noted in five cases (71%) of Group III.
3. Hearing impairment was noted in five cases (71%) of Group III.
In Group III it is necessary to consider about the factor of the neurosis or psychosomatic disease.
