[Pure testicular choriocarcinoma]

We present a case of pure testicle choriocarcinoma in a 13-year-old male. Its first clinical manifestation consisted in a pattern of acute dyspnea caused by multiple pulmonary metastases. Alphafetoprotein investigation in serum and tissue proved negative. We carry out an immunohistochemical study of the case and discuss its histogenesis current classification and prognostic significance.