Lymph Node Metastases of Medullary Thyroid Cancer: Role of Calcitonin in the Washout Fluid of Fine-Needle Aspiration

Table 2

Patients with detectable levels of FNA-CT in LN washout fluid (available as a supplementary file).

	Personal history	LN (size, mm)	FNAC	FNA-CT (pg/mL)	Serum CT (pg/mL)	Histology
Patient 1	MTC	LN1 (18)	MTC LN metastasis	200000	86.9	MTC LN metastasis
Patient 2	MTC	LN 1 (17.4)	Nondiagnostic	704	932	MTC LN metastasis
Patient 3	MTC	LN 1 (15.5)	Nondiagnostic	1086	533	MTC LN metastasis
Patient 4	MTC	LN1 (15)	Nondiagnostic	312	9704	MTC LN metastasis
Patient 5	MTC	LN1 (16)	MTC LN metastasis	85621	635	MTC LN metastasis
Patient 6	MTC	LN 1 (25)	Benign	<2	794	—
				<2
		LN 2 (40)	MTC LN metastasis	11065	3796	MTC LN metastasis
				40226
		LN3 (15)	MTC LN metastasis	4913	121	MTC LN metastasis
		LN 4 (12)	Benign	<2	340	—
				<2
Patient 7	Nonthyroidectomized	LN 1 (45)	MTC LN metastasis	15111	1871	MTC LN metastasis
	MTC	LN 2 (14)	MTC LN metastasis	6779	1224	MTC LN metastasis
				60.2	1224
Patient 8	MTC	LN 1 (13.2)	MTC LN metastasis	117	277	MTC LN metastasis
				2014
		LN 2 (18.8)	MTC LN metastasis	4653		MTC LN metastasis
		LN 3 (12)	Benign	<2	545	—
				<2
		LN 4 (14)	Benign	<2		—
		LN 5 (18)	MTC LN metastasis	40.4	598	MTC LN metastasis
				490
		LN 6 (13)	MTC LN metastasis	838	515	MTC LN metastasis
				1686
Patient 9	Nonthyroidectomized	LN 1 (25.5)	DTFC	5.6	7	DFTC LN metastasis
Patient 10	Nonthyroidectomized	LN 1 (25)	MTC LN metastasis	7364	5007	MTC LN metastasis
				66104
	MTC	LN 2 (28.4)	MTC LN metastasis	200000	1355	MTC LN metastasis
		LN 3 (27)	MTC LN metastasis	1488	2524

One patient with a detectable FNA-CT (1488 pg/mL) and MTC LN metastases on cytologic examination did not undergo surgery and started systemic therapy.