in a series of 50 patients with testicular tumours evaluated prior to orchidectomy , 12 out of 19 with pure seminoma and seven out of 31 with non-seminomatous or mixed seminomatous and non-seminomatous germ cell tumours had elevated plasma lactate dehydrogenase isoenzyme 1 concentrations .
C0036631
pure seminoma
C0205851
germ cell tumours