Abstract
We reviewed 442 (males : 248, females : 194) patients with recurrent laryngeal nerve paralysis (RLNP) at Ehime University Hospital from 1976 through 1996. Their mean age was 55.8 years ; that of the males was 57.8, and that of the females was 53.6 (p<0.05) . The affected nerve was unilateral in 400 patients (the right in 132 cases, and the left in 268) and bilateral in 42. The number of patients with postoperative RLNP was 181 (41%) . We also compared the results obtained from 1976 to 1985 with those from 1986 to 1996. The number of patients from 1976 to 1985 was 201 (males : 102, females : 99), while that from 1986 to 1996 was 241 (males : 146, females : 95) . There was a significant increase in male patients (p<0.05) . The number of patients with postoperative RLNP from 1976 to 1985 was 55 (27.4%), while that from 1986 to 1996 was 126 (52.3%) . There was a significant increase in patients with postoperative RLNP (p<0.01), which was caused by an increase in the number of cases who had had surgery for thyroid tumors and esophageal cancer. On the other hand, there was a significant decrease in patients due to chest diseases (p<0.05) . The ratio of idiopathic RLNP from 1986 to 1996 was lower than that from 1976 to 1985, but the difference was not statistically significant.
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