– New preoperative basal calcitonin thresholds from a large multicenter cohort (N=509) correlate with the anatomical extent of lymph node metastasis in medullary thyroid carcinoma (MTC).
– Proposed cutoffs: 241.9 pg/mL for central compartment involvement; 693.9 pg/mL for ipsilateral lateral neck; 2378.5 pg/mL for bilateral/contralateral lateral neck; 2787.1 pg/mL for upper mediastinal metastasis.
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