In a retrospective study 75 patients with T2 laryngeal cancer treated from 1981 through 1985 were analysed. Of this group 71 patients had a full course of radiotherapy as primary therapy. All 71 patients were given 70 Gy/7 weeks on the primary and 50 Gy/5 weeks on the neck, 2 Gy per fraction. Various prognostic factors for local control and survival were studied. In our patient group we found vocal cord mobility to be an important prognostic factor for ultimate local control and survival. Patients with impaired cord mobility had a significantly worse ultimate local control (76%) than patients with normal cord mobility (98%) and a significantly worse corrected actuarial survival. It is concluded that impaired cord mobility means more advanced disease. Future studies will have to answer the question how to improve the local control rate in patients with impaired cord mobility, for example, by incorporating laryngectomy earlier in the treatment program of those patients who can not be cured by radiotherapy alone or by using innovative radiotherapy protocols.