[Laryngeal oncocytoid changes--hyperplasia or neoplasia?].

It is suggested that oncocytoid changes in glandular tissue represent a continuum in the development from metaplasia via increasing hyperplasia to neoplasia. This theory, which is supported in the literature, is based on three of the authors' own cases of oncocytoid changes in the larynx. The significance of differentiating between hyperplasia and neoplasia is emphasized as the neoplastic changes such as the oncocytoid papillary cystadenoma should be extirpated radically in order to avoid recurrence.