Family aggregation in Bell's palsy.

Some authors have reported a familial aggregation in Bell's paralysis. However, the information so far forthcoming is unsatisfactory and even contradictory. Our survey consisted of 115 patients, 30.5% of whom had an affected first-degree relative, which, compared with the control group figure of 3.6%, is highly significant. The frequency of 30.5% of families with an affected first-degree relative is the highest reported in literature.