[Bilateral testicular neoplasms]

With 23 years an embryonal teratoma of the testicles and with 29 years a seminoma was treated by semicastration and post-irradiation or applications of cytostatics. In the two cases 10 or 12 years later seminomas of the other side appeared. Problems of the double-side simultaneous and successive affection are discussed, therapeutic consequences derived and the prognosis is entered. Apart from this the clinical and morphological signs of bilateral metastases of the testicles by a bronchial carcinoma are explained and discussed.