Photodynamic therapy and fluorescence localisation of experimental oral dysplasia and squamous cell carcinoma: A study with aluminium phthalocyanine disulphonate.
Thesis published in 1997 by
Max Johannes Hendrikus Witjes 
Abstract
The majority of tumours in the head and neck regions are squamous cell carcinomas of the upper aerodigestive tract. Curative treatment modalities for these tumours are surgery, radiotherapy or a plannend combination of both. . Zie: Summary