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Prognostic value of lymph node ratio in metastatic papillary thyroid carcinoma.

Prognostic value of lymph node ratio in metastatic papillary thyroid carcinoma.
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Mansour J, Sagiv D, Alon E, Talmi Y,


Mansour J, Sagiv D, Alon E, Talmi Y, (click to view)

Mansour J, Sagiv D, Alon E, Talmi Y,

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The Journal of laryngology and otology 2017 11 10() 1-6 doi 10.1017/S0022215117002250

Abstract
OBJECTIVE
Cervical metastases in papillary thyroid carcinoma are associated with increased recurrence. However, their effect on survival remains controversial. This study evaluated literature on the prognostic value of lymph node ratio for loco-regional recurrence and survival in metastatic papillary thyroid carcinoma.

METHODS
The PubMed database was systematically searched using the terms ‘papillary thyroid carcinoma’ and ‘lymph node ratio’. Articles addressing the association between lymph node ratio and loco-regional recurrence or survival were identified.

RESULTS
Nine retrospective studies were included, comprising 12 400 post-thyroidectomy and neck dissection papillary thyroid carcinoma patients (median age, 48.6 years; 76 per cent females). Lymph node ratio was associated with worse recurrence-free survival in 60 and 75 per cent of studies investigating the effect of central compartment metastases and both central and lateral compartment metastases on recurrence-free survival, respectively. One large population-based study showed an association between lymph node ratio and disease-specific mortality in N1 nodal disease, but failed to maintain the same association when N1b patients were excluded.

CONCLUSION
Regional lymph node ratio is an independent predictor for loco-regional recurrence in pathologically staged N1 patients with papillary thyroid carcinoma. Patients with a high lymph node ratio should be closely followed up.

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