1990 Volume 1990 Issue Supplement37 Pages 121-127
Recent patients with cystic diseases of the paranasal sinus in our clinic,78 patients, were observed clinically and statistically.
Postoperative cysts were predominant accounting for 76%. Many of them occurred in the maxillar sinus and non-operative ones were found frequently in the frontal sinus.
The male patients tended to be more in the postoperative cysts with a sex ratio o f 2: 1, but difference due to sex was not observed in the non-postoperative patients.
The age distribution in patients with postoperative cysts was c ompared with that reported hitherto. Although the age distribution of the first operation for sinusitis was unchanged, there was tendency to predominance in elderly patients as for the age of cysts occurrence with a mean age of 43.2 years, because the time that elapsed after operation became longer. Onset at advanced ages was found more in patients with non-postoperative cysts than in those with postoperative ones and mean age in the former was 58.5 years.
The age distribution was analyzed by sex in patients with postoperative cysts. Since the age of the first operation for sinusitis was greater in males, the age of onset of cysts tended to shift to a higher ages than in the cases of females.
