100 of 250 patients treated for plantar warts with an irradiation dosage of 3–4 × 1000 r/ 50 kV/1.0 mm Al were reexamined after an average interval of 11.3 years. The following results were obtained in the 91 patients who were cured by this treatment: 7 patients showed serious post-irradiation damage; in 2 patients recurrence had taken place; 31 revealed slight X-ray changes of the skin, whereas in 51 patients no pathological changes by irradiation could be detec