Abstract
A) Criteria of indication
In order to formulate the criteris for selection of partial laryngectomy, the following experiments were performed.
1) The compartmentalisation of lymphatic flow were reconfirmed by the injection of radiogold 198 Au into the different area of animal larynx.
2) The mode of spread of laryngeal cancer were minutely analysed by the anatomo-pathological examination on the specimens extirpated by the total laryngectomy.
3) Clinical observation of the partial laryngectomized cases were analysed in consideration of location, extention and microscopic character of lesion, lymphadenopathy and mobility of vocal cord etc.
The resulte obtained by these experiments to formulate criteria of the indication to the partial laryngectomy.
B) Determination of indication
X-ray diagnosis especially tomography or contrast laryngography and endoscopy are indispensable to determine the extension of laryngeal cancer. But it is difficult to ascertain the submucous infiltration of the cancer.
To resolve this problem, pulsed ultrasound was clinically applied and the extention of the cancer to the submucous area was sufficiently recognized before operation by A and B scan.
C) Conclusion
Although our cases can not prove the long term resulte, partial laryngectomy (vertical and horizontal) must be applied more frequently after confirming its indication by the diagnostic procedure mentionned previously.
