Abstract
Previous studies of follicular thyroid tumors have shown loss of heterozygosity (LOH) on the short arm of chromosome 3 in carcinomas, and on chromosome 10 in atypical adenomas and carcinomas, but not in common adenomas. We studied LOH on these chromosomal arms in 15 follicular thyroid carcinomas, 19 atypical follicular adenomas and 6 anaplastic (undifferentiated) carcinomas. Deletion mapping of chromosome 10 using 15 polymorphic markers showed that 15 (37.5%) of the tumors displayed LOH somewhere along the long arm. Thirteen of these tumors showed deletions involving the telomeric part of chromosome 10q, distal to D1OS 187. LOH on chromosome 3p was found in 8 (20%) cases. Seven of these also showed LOH on chromosome 10q. In eight cases LOH was seen on chromosome 10q but not 3p. In comparison, the retinoblastoma gene locus at chromosome 13q showed LOH in 22% of the tumors. Most of these also had deletions on chromosome 10q. The results indicate that a region at the telomeric part of 10q may be involved in progression of follicular thyroid tumors.
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Zedenius, J., Wallin, G., Svensson, A. et al. Deletions of the long arm of chromosome 10 in progression of follicular thyroid tumors. Hum Genet 97, 299–303 (1996). https://doi.org/10.1007/BF02185758
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DOI: https://doi.org/10.1007/BF02185758