[Histopathological study of local invasion and cervical lymph node metastasis in transglottic carcinoma]

To study the histopathological characteristics of local invasion and cervical lymph node metastasis in transglottic carcinoma and provide theoretical guide to clinical practice, 30 laryngectomy and 35 neck dissection specimens were studied by serial section, HE staining and observation under light microscope. The results showed that transglottic carcinomas originated from the ventricle invaded supraglottic and glottic areas equally. The metastatic rate of cervical lymph nodes was 43.3%; the latent metastatic rate was 30%. The metastatic and extracapsular perforation rates as well as the number of the aggregated fusion lymphnodes increased with the increase in the size of the lymphonodes. It was concluded that the transglottic carcinoma should be defined as one with the main lesion locates in the ventricle, or the ventricle being the center with transglottic spread. Since the barrier of ventricle was weak, partial laryngectomy should be performed with care, and ipsilateral neck dissection shoud be included during operation.