術後性頬部嚢腫の研究

概要

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Clinical and histological observation of the postoperative paranasal cysts was made. The con-clusion was as follows:1) In the clinical and statistical observation in 120 cases such as patiants age, sex, affected side and duration, the results were almost as same as those have been reported.2) In the treatment, recurrence is prevented by making two large communications between the cyst and the nasal cavity through the middle and lower nasal meatus, in spite of the traditional operation in which the cyst is removed completely.3) In the pathological and histological studies, mucous epithelium, most of which was ciliated, was observed in 14 out of 17 cases including some multilocular cysts.4) In the microscopic observation of the basement membrane, it is apparently recognized that the membrane consists of thin basement membrane and membraneous hyaline layer secondarily pro-duced. The layer, therefore, existed in verious forms and was observed in about 40 per cent of all the cases. The epithelium was all ciliated5) The, assumption about the pathogenesis of the cyst obtained by the operation and the path-ological and histological studies is that; the cyst, i. e. the retention cyst, develops from small inde-ntation of the sinus bone, which remain with mucous membrane after the operation. Considerring the above fact, therefore, it is quite effective to make Communication between the cyst and the nasal cavity as a method of treatment.