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Cytogenetic findings‐in 19 malignant bone tumors
Author(s) -
Ozisik Yavuz Y.,
Meloni Aurelia M.,
Peier Andrea,
Altungoz Oguz,
Sandberg Avery A.,
Spanier Suzanne S.,
Zalupski Mark M.,
Leong Stanley P. L.
Publication year - 1994
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/1097-0142(19941015)74:8<2268::aid-cncr2820740810>3.0.co;2-5
Subject(s) - chromosomal translocation , karyotype , chromosome , pathology , ploidy , cytogenetics , biopsy , ring chromosome , biology , chromosomal rearrangement , breakpoint , abnormality , somatic evolution in cancer , chromosome abnormality , cancer , medicine , cancer research , genetics , gene , psychiatry
Background. The majority of karyotypes observed in osteosarcomas (OS) and chondrosarcomas (CS) are complex, Specific chromosomal abnormalities have not yet been characterized in either tumor except for a ring chromosome in parosteal OS. The purpose of this study was to determine recurrent chromosomal abnormalities and establish a possible correlation between the cytogenetic changes and the pathologic findings. Methods . Ten OS and nine CS were cytogenetically analyzed. Tumor samples were obtained from patients having a resection or incisional biopsy. Cytogenetic study of short term cell cultures included harvesting and Gbanding, which were performed by routine methodologies. Results . Clonal abnormalities were observed in six OS and six CS. Modal chromosome numbers ranged from near diploid to near tetraploid in both types of tumors. The structural rearrangements observed in OS involved mostly chromosomes 1, 2, 6, 12, and 17. Nonreciprocal translocations were the most frequent event. Two OS had a single clonal abnormality involving 11p15 and 14q32, respectively. Double minute chromosomes were observed in three cases. In CS, the most frequent structural abnormalities were nonreciprocal translocations and deletions involving numerous chromosomes. Rearrangements of 1p together with other abnormalities were observed in four CS. Conclusions . The karyotypes were usually complex consisting of numerical and structural changes, particularly in high grade tumors. Rearrangements of 11p15 and 14q32 in OS and possibly 1p in CS were found as primary cytogenetic aberrations. Cytogenetic analysis in more cases of OS and CS together with molecular studies are necessary to characterize further the consistent genetic changes in these tumors.