Two cases of large cystic craniopharyngioma were operated by transnasal route. Both cases showed suprasellar extension of the tumour and complete excision of the tumour was considered impossidle. By means of transnasal hypophysectomy approach, contents of the cystic tumour was aspirated and polyethylene tube was inserted as a permanent drain into the nasal caity. Both cases died eventually, but this surgery served as a palliative measure. For this type of tumour, transnasal surgery is relatively simple and can be managed by experienced otolayngologists. Also, retention tube drain can be placed into the nasal cavity. We feel that this is a method of choice in case of an advanced inoperable cystic tumour, as a method of decompression.
Radiological examination of the frontal sinus was conducted before and after frontal sinus operation (Killian's method) with their follow up over a year. Studies of these films revealed that the postoperative state of the frontal sinus could be classified into the following 5 groups. Group a. postoperative obliteration of the sinus cavity.8% Group b. postoperative partial obliteration of the sinus cavity61.8% Group c. partial obliteration with regeneration of the sinus 4.5% Group d. cnonobliteration but regenerative extension of the sinus cavity18.2% Group e, unchanged 7.5% Among these groups, a, b, and e have been reported but the existence of group c and d are new findings which have not been recogniszed by this time. It has been noted that the incidence of postoperative regeneration of the frontal sinus is more frequent in the young age group and among those witn large frontal sinus preoperatively.