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- W3149297816 abstract "Abstract Background The N stage in papillary thyroid cancer (PTC) is an important prognostic factor based on anatomical localization of cervical lymph nodes (LNs) only and not the extent of lymphatic metastasis. In this retrospective study, the clinical significance of lymph node ratio (LNR) and tumor cell proliferation in relation to the conventional classification of PTC was explored. Methods Patients diagnosed with PTC at the Karolinska University Hospital in Stockholm, Sweden, during the years 2009–2011 were included. The LNR, defined as the number of metastatic LNs divided by the total number of LNs investigated, and the Ki-67 index were analyzed in relation to clinical data. Results The median number of LN removed was 16 with the following N stage distribution: N0 (26%), N1a (45%), and N1b (29%). A Ki-67 index of ≥3% was significantly correlated with the presence of metastases and tumor recurrence with a sensitivity of 50% and specificity of 80% ( p = 0.015). Lymph node ratio ≥21% was related to tumor recurrence with sensitivity of 89% and specificity of 70% ( p = 0.006). Patients with LN metastases in the lateral cervical compartment only had significantly lower LNR (14.5%) compared to those with both central and lateral cervical metastases (39.5%) ( p = 0.004) and exhibited no tumor recurrence. Increased Ki-67 index was significantly related to LNR ≥21% ( p = 0.023) but was not associated with N stage. Conclusions The Ki-67 proliferation index and LNR may better reflect the malignant behavior of PTC compared to the anatomical classification of LN metastases solely." @default.
- W3149297816 created "2021-04-13" @default.
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- W3149297816 date "2021-04-07" @default.
- W3149297816 modified "2023-10-15" @default.
- W3149297816 title "The Clinical Significance of Lymph Node Ratio and Ki-67 Expression in Papillary Thyroid Cancer" @default.
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- W3149297816 doi "https://doi.org/10.1007/s00268-021-06070-y" @default.
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