In presenting this study of 24 cases of malignant tumors of the nasopharynx we wish to emphasize particularly the histopathology and, if possible, to clarify the nomenclature of a type of growth which we believe is characteristic of this location. The literature is full of confusions and contradictions in the designation of nasopharyngeal growths, so that it is often difficult to understand what is meant by the terms which various authors have employed. We have examined most of the available reports and find that the tumors, roughly speaking, fall within three groups, namely, carcinomas, sarcomas and endotheliomas. The subdivisions of these groups are numerous and add much to the confusion of the terminology. For instance, under carcinomas we find the following types mentioned: squamous carcinoma, scirrhous carcinoma, nonepidermoid or basocellularis carcinoma, epidermoid or spinocellularis carcinoma, intermediary epidermoid carcinoma, anaplastic carcinoma, adenocarcinoma, undifferentiated carcinoma, transitional cell carcinoma