[Application of chlorophyll in the cervical lymph nodes dissection of laryngeal and hypopharyngeal carcinomas].

Objective: To investigate the patterns of cervical lymph node metastases from the carcinomas of larynx and hypopharynx.

Method: Chlorophyll solution was injected submucosally into some portions of the larynx and hypopharynx preoperately as a stain of lymphatic system to help conduct modified neck dissections in 50 patiants with laryngeal or hypopharyngeal carcinomas. Searial sections were performed.