The cell line CIPL38 was derived from the pleural effusion of a patient with small cell lung cancer. The karyotype was hyperdiploid and complex with a variable number of marker chromosomes. Two of the markers had large homogeneously staining regions (hsr), which were shown to consist of amplified MYCN by in situ hybridization. One hsr bearing a marker chromosome could not be identified with G-banding, but the other was situated on a der(14). This was elucidated further with FISH analysis, which enabled the identification of sequences of chromosome i involved in a complex rearrangement with chromosome 14 and the hsr.
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