Endocrinol Metab > Volume 22(6); 2007 > Article
Journal of Korean Endocrine Society 2007;22(6):419-427.
DOI: https://doi.org/10.3803/jkes.2007.22.6.419    Published online December 1, 2007.
The Clinical Significance of Retinoic Acid Receptor beta Expressions in Primary and Recurred Metastatic Lymph Node Papillary Thyroid Carcinomas.
Jae Pil Han, Seong Jin Lee, Kyung Chan Choi, Young Euy Park, Hae Ri Lee, Jun Goo Kang, Ohk Hyun Ryu, Chul Sik Kim, Byung Wan Lee, Eun Gyung Hong, Hyeon Kyu Kim, Doo Man Kim, Jae Myung Yoo, Sung Hee Ihm, Hyung Joon Yoo, Moon Gi Choi
1Department of Internal Medicine, College of Medicine, Hallym University, Korea.
2Department of Diagnostic Pathology, College of Medicine, Hallym University, Korea.
Abstract
BACKGROUND
The present study was designed to investigate the correlations of retinoic acid receptor beta(RARbeta) expression for primary and recurred metastatic lymph node (LN) papillary thyroid carcinoma (PTC) tissues and the correlations of RARbeta expression with the uptake of I(131) as detected on a whole body scan (WBS). METHODS: Primary and metastatic LN PTC tissues were examined by immunohistochemical methods. Staining positivity was calculated, and staining intensity was graded as negative (0), weak (1+), moderate (2+) and strong (3+). Nuclear staining intensity (NSI) of cells from tissues was also examined. RESULTS: Seventeen patients who had regional cervical LN metastasis without distant metastasis were included in the study, and 13 patients had the abnormal uptake of I(131) as detected on a WBS. In primary PTC tissues, RARbeta staining positivity and intensity of carcinoma cells were significantly higher than those of normal cells but NSI was significantly higher in normal cells than carcinoma cells. Between primary and metastatic LN PTC tissues, RARbeta staining intensity was correlated after controlling for age. Primary PTC tissues from 14 (82.4%) out of 17 patients were concordant between NSI and the uptake of I(131) as detected on a WBS. NSI predicted the I(131) uptake as detected on a WBS with 81.3% positive predicted value (PPV) and 100% negative predicted value. Metastatic LN PTC tissues from 13 (76.5%) out of 17 patients were concordant between NSI and the uptake of I(131) as detected on a WBS. NSI predicted the uptake of I(131) as detected on a WBS with 76.5% PPV. When the results of NSI taken either as positive or negative were correlated with those of the uptake of I(131) as detected on a WBS in primary and metastatic LN PTC tissues, the correlation was not significant after controlling for age. CONCLUSION: Our results demonstrate that nuclear RARbeta expression may be decreased in PTC tissues than normal thyroid tissues, and RARbeta expression in primary PTC tissues as well as in recurred metastatic LN PTC tissues may predict the uptake of I(131) as detected on a WBS.
Key Words: papillary thyroid carcinoma, RARbeta, whole body scan


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