Cytogenetic study of a case of synchronous bilateral seminoma

Cytogenetic analysis of a case of synchronous bilateral seminoma revealed, for each tumor, a chromosomal hypotetraploid mode with gain and loss of chromosomes and only one structural rearrangement, del(lp) and i(12p), which were secondary chromosomal events for the left and right tumors, respectively. This study allowed us to discriminate between a sole or independent origin for these two tumors.