A poorly differentiated sarcoma in a 32-year-old female revealed a large, abnormally banded region in one chromosome #8 in all metaphases. The modal karyotype was 46,XX, -8, +mar. Southern blot hybridization was performed with probes for two protooncogenes located in chromosome 8q (c-MYC and c-MOS). No amplification or rearrangement was observed to account for the cytogenetic abnormality.
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