Supraglottic larynx and its pathology as studied by whole laryngeal sections

The need for additional data regarding the behavior of carcinomas of the supraglottic larynx was recognized during attempts to identify candidates for supraglottic laryngectomy. The crux of the matter was whether supraglottic carcinomas remain confined at the supraglottic larynx. If some do not, can these exceptions be detected preoperatively?