Abstract
The author has made a histological investigation about 44 cases of maxillary cancer which were treated in the Department of Otorhinolaryngology, Kyushu University since 1961. All of the cases have been treated preoperatively by irradiation with dosis from 500 rads to about 4000 rads. The tumor mass of 44 cases of maxillary cancer obtained by surgical removal were examined. Paraffin sections of one entire cut surface from the tumor with largest dimension were stained with hematoxylin and eosin, van Gieson and silver stain. All of the patients were followed for 5 years after the operation.
Results obtained are as follows:
1) There was no special relationship between histological type or cornification of the tumor and survival ratio.
2) The histological classification by BRODERS were employed in 42 cases about biopsy specimens which were obtained before irradiation. There was a distinct correlation between the ratio of anaplastic cancer cells and prognosis in the Grade 1 and Grade 4 groups of these cases, although there was none in the Grade 2 and Grade 3 groups.
3) It was clarified that the CPL classification C Imm) closely correlated to the prognosis in maxillary cancer, even in preoperatively irradiated cases.
4) Histological grading of irradiation change which has been brought forward by OHBOSHI and SHIMOSATO was also employed in our series, and con-sequently it was concluded that OHBOSHI'S histological grading would be most useful to indicate the prognosis of maxillary cancer treated with irradiation.
