Abstract
Interactions between neoplastic cells and neighboring stromal cells affect tumor morphology and behavior. The present study aimed to identify specific chromosomal aberrations that influence tumor–stroma interactions in colorectal cancer (CRC). Chromosome copy number changes of 23 carcinomas were analyzed by comparative genomic hybridization (array-CGH). Stroma percentage was determined by quantitative measurements of hematoxylin–eosin stained sections. Loss of 1p36 was associated with a decrease, and loss of 9q34 with an increase in CRC stroma percentage. Moreover, gain of 8q24 was associated with increased stroma percentage in CRCs with 20q gain, a major event in colon adenoma-to-carcinoma progression. These data indicate that different cancer genomes have different effects on tumor–stroma interactions, and suggest that determination of specific chromosomal aberrations in CRCs may be used as clinical parameter to predict tumor behavior.
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