Comparison of the prognostic values of selected inflammation based scores in patients with medullary thyroid carcinoma: A pilot study

Background

The significance of inflammation based scores including the neutrophil-to-lymphocyte ratio (NLR), derived neutrophil-to-lymphocyte ratio (dNLR), platelet-to-lymphocyte ratio (PLR), lymphocyte-to-monocyte ratio (LMR), prognostic nutritional index (PNI), and plasma fibrinogen remains unclear in medullary thyroid carcinoma (MTC). We aimed to compare the prognostic value of these scores.

Methods

Seventy-eight patients newly diagnosed as MTC with operation in our institution from May 2009 to September 2016 were retrospectively evaluated. Receiver operating characteristic (ROC) curves and Kaplan-Meier analyses were calculated to compare the prognostic value of these scores.

Results

Increased PLR was predictive of lymph node metastasis (AUC = 0.644, P = 0.022), capsule invasion (AUC = 0.666, P = 0.007), advanced tumor stages (AUC = 0.657, P = 0.011), and recurrence (AUC = 0.655, P = 0.049). Increased fibrinogen was predictive of lymph node metastasis (AUC = 0.669, P = 0.006) and capsule invasion (AUC = 0.631, P = 0.038). Reduced PNI was predictive of recurrence (AUC = 0.655, P = 0.049). Kaplan-Meier analyses and Cox regression analysis revealed that PLR was a significant predictor for recurrence.

Conclusions

PLR, fibrinogen, and PNI are all predictive. Specially, PLR is superior to other inflammation based scores in terms of prognostic ability.

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