Journal
CLINICAL ENDOCRINOLOGY
Volume 82, Issue 2, Pages 300-306Publisher
WILEY
DOI: 10.1111/cen.12486
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Funding
- Korea Institute of Radiological & Medical Sciences [KIRAMS/RR-023/2006]
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ObjectivesWe investigated the expression of oestrogen receptors (ERs) in papillary thyroid cancers (PTCs) and evaluated their prognostic role. MethodsWe enrolled 81 female patients who underwent thyroid surgery and had a confirmed diagnosis of PTC between 01 January 1995 and 31 December 1996. Data on clinicopathologic parameters were obtained from patients' medical records. Tissue paraffin blocks of these 81 patients were collected for immunohistochemistry for ER and ER. ResultsER expression was observed in only eight patients (99%). In contrast, ER expression was positive in 36 (444%) patients. Total thyroidectomy (844% vs 611%, P=0017) and cervical lymph node metastasis (622% vs 222%, P=0000) were more frequent in the ER-negative group than in the ER-positive group. Among younger female patients (<45years), the ER-negative group showed a tendency towards more frequent recurrent or persistent disease than the ER-positive group (423% vs 136%, P=0029). In contrast, the ER-positive group showed more recurrent or persistent disease than the ER-negative group in older female patients (100% vs 241%, P=0024). In multivariate analysis, ER negativity, extrathyroidal invasion and radioactive iodine treatment were risk factors for recurrence in young female patients. ConclusionLoss of ER expression was associated with recurrence in young female PTC patients. This finding suggests that oestrogen might play a protective role in the progression of PTC via ER, especially in young female patients.
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