Significance of aneuploid stemlines in testicular nonseminomatous germ cell tumors.
BACKGROUND
Hyperpentaploidy in testicular nonseminomatous germ cell tumors (TNSGCT) has been associated with progression of disease of patients who initially had TNSGCT in Stage I.


METHODS
The authors used flow cytometry to investigate the relationship between ploidy and the clinical behavior in TNSGCT, focusing on hypertetraploid values (DNA index, > 2.00).


RESULTS
Patients with TNSGCT containing an aneuploid stemline with a hypertetraploid value more often had higher clinical stage of disease and a higher chance of relapse in advanced stages. The presence of multiple aneuploid stemlines in the tumors was found more frequently in patients who had higher clinical stage disease.


CONCLUSIONS
The results suggest that the presence of highly aneuploid or multiple aneuploid stemlines in TNSGCT are associated with a clinically more malignant behavior.
Department of Pathology, State University of Groningen, The Netherlands.
W E
WE
de Graaff
D T
DT
Sleijfer
B
B
de Jong
A
A
Dam
H
H
Schraffordt Koops
J W
JW
Oosterhuis
D000293:Adolescent; D000328:Adult; D000368:Aged; D000782:Aneuploidy; D004273:DNA, Neoplasm / Q000032:analysis*; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009373:Neoplasms, Germ Cell and Embryonal / Q000235:genetics* / Q000473:pathology; D011123:Polyploidy; D011379:Prognosis; D013736:Testicular Neoplasms / Q000235:genetics* / Q000473:pathology
D004273:DNA, Neoplasm