Reliable differential diagnosis between osteosarcoma and regenerative bone cells in rats through simultaneous analysis of nuclear DNA content and size.
OBJECTIVE
To evaluate the difference between benign proliferative lesions of regenerative bone calluses and malignant tumors in rats by simultaneous analysis of nuclear DNA content and size.


METHODS
Nuclei were stained with DAPI and measured by cytofluorometry. Five regenerative bones and five osteosarcoma samples were used. Two-dimensional dispersion diagrams between relative nuclear DNA content and nuclear size were drawn up and their regression lines were compared.


RESULTS
It was possible to distinguish between osteosarcomas and regenerative bones by simultaneous analysis of nuclear size and DNA content during the cell cycle. The results yielded coefficients of correlation and regression. All five regression lines of osteosarcomas were situated dramatically higher on dispersiongrams than those of regenerative bones.


CONCLUSIONS
Differential diagnosis between regenerative lesions and malignant tumors may now be possible using simultaneous measurement of nuclear DNA content and size.
Sato
T
T
Department of Medical Technology, School of Allied Medical Sciences, Hirosaki University, Japan.
Miura
T
T
Nakano
K
K
Nozaka
H
H
Sato
T
T
Ishikawa
T
T
Chiba
M
M
Kanagawa
Y
Y
Kizawa
C
C
Hasegawa
S
S
Yasujima
M
M
D000818:Animals; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000235:genetics; D002146:Bony Callus / Q000166:cytology; D002467:Cell Nucleus / Q000737:chemistry / Q000648:ultrastructure; D048429:Cell Size; D004273:DNA, Neoplasm / Q000032:analysis; D003937:Diagnosis, Differential; D005260:Female; D005434:Flow Cytometry; D012516:Osteosarcoma / Q000175:diagnosis* / Q000235:genetics; D051381:Rats
D004273:DNA, Neoplasm