[A morphologic and follow-up study on nasopharyngeal lymphoid hyperplasia and its relation to cancer].

Forty-three cases of nasopharyngeal lymphoid hyperplasia (NPLH) were studied morphologically and had been followed-up for a period of 7.5 years in a high-incidence city of nasopharyngeal carcinoma (NPC). The authors suggest that NPLH might be recognized as a disease entity in adults. Basing on the sites and gross appearances of the hyperplastic lymphoid tissue, two types of NPLH, namely, adenoids and nodular might be distinguished. The histopathological changes of NPLH are described in detail and its relation to the development of NPC is discussed. According to the data of this study, the authors' opinion is that NPLH is not a precancerous condition.