[en] Introduction Velotonsillar carcinomas are treated in the CAV and the DDHCC by a similar protocol, that is a combination of external beam radiation therapy (46-50 Gy) and a brachytherapy boost. The techniques of implantation, dosimetry and decision making criteria appear to differ substantially. For a better understanding of the clinical consequences, the brachytherapy procedures in both institutions were critically reviewed. Methods and Results The decision trees followed in the treatments of both institutes will be compared for each of three consecutive patients with localized velotonsillar tumors treated in both CAV and DDHCC. Dose specification in the CAV is based on the Paris system, while in the DDHCC the dose is specified in dose points chosen at a fixed distance from the plane of implantion. See table for treatment parameters for each institute: Discussion and Conclusions The discussion will focus on the question whether the differences in the implant techniques and dose specification methods, lead to recognizable differences in treated volumes which might reflect clinical results. From this comparison, guidelines for relevant dose specification and reporting, e.g. using CT-scans in defining target volumes, will be presented