[Methodical and critical analysis of the determination of target volumes in case of hypopharyngeal and epiglottic tumors and the adaptation of the dose distribution to their dimensions.--Part 1 (author's transl)].

After having discussed the problem of optimization with regard to the dose distribution in space, the authors enter into the particulars of the classification of hypopharyngeal and epiglottic tumors according to the TNM system. Taking into consideration the communications of literature and the cases of the Radiologic Hospital of the University of Heidelberg, the authors describe the clinical manifestations of these tumors, their histology, their distribution to age and sex, their symptomatology and time of anamnesis as well as the therapeutic results.