ATC	Anaplastic thyroid carcinoma
ATG	Anti-thyroglobulin antibodies
ATPO	Antibodies against thyroid peroxidase
BMI	Body mass index
BST2	Bone marrow stromal cell antigen 2
Ca 19-9	Carbohydrate antigen 19-9
CCH	C-cell hyperplasia
ccf-mtDNA	Cell-free mtDNA
CEA	Carcinoembryonic antigen
circRNAs	Circular RNAs
CLEIA	Chemiluminescence enzyme immunoassay
CLIA	Chemiluminescence assays
CT	Calcitonin
CT-CALCA	CT-related polypeptide alpha transcript
CTCs	Circulating tumor cells
ctDNAs	Circulating tumor DNAs
ctNAs	Circulating tumor nucleic acids
ctRNAs	Circulating tumor RNAs
CV	Coefficients of variation
DTC	Differentiated thyroid carcinoma
ECLIA	Electrochemiluminescence assays
ELISA	Enzyme-linked immunosorbent assay
ELFA	Enzyme-linked fluorescence assay
EQA	External quality assessment
EVs	Extracellular vesicles
FIA	Fluoroimmunoassay
FEIA	Fluorescence enzyme immunoassay
FMTC	Familial medullary thyroid cancer
FNAB	Fine needle aspiration biopsy
FTC	Follicular thyroid carcinoma
GFRA2	Glial cell line-derived neurotrophic factor family receptor alpha-2
HAMA	Human anti-animal antibodies
hsTG	TG assays with high analytical sensitivity
IYD	Iodotyrosine deiodinase
ILMA	Immunoluminometric assay
IMAs	Immunoassays
IRMA	Immunoradiometric assay
IRP	International Reference Preparation
LC-MS/MS	Liquid chromatography coupled to tandem mass spectrometry
lncRNAs	Long non-coding RNAs
LNM	Lymph node metastasis
LOD	Limit of detection
MEN	Multiple endocrine neoplasia
mRNAs	Messenger RNAs
miRNAs	MicroRNAs
MTC	Medullary thyroid carcinoma
mtDNA	Mitochondrial DNA
ncRNAs	Non-coding RNAs
NENs	Neuroendocrine neoplasms
NGS	Next-generation sequencing
OTC	Oncocytic thyroid carcinoma
PPIs	Proton pump inhibitors
PPV	Positive predictive value
ProCT	Procalcitonin
PTC	Papillary thyroid carcinoma
PTMC	Papillary microcarcinoma
RAI	Radioactive iodine
rhTSH	Recombinant human TSH
RIA	Radio immunoassay
ROC	Receiver-operating characteristic
TG	Thyroglobulin
T3	Triiodothyronine
T4	Thyroxine
TPO	Thyroid peroxidase
TRACE	Time Resolved Amplified Cryptate Emission
TSH	Thyrotropin
TSHR	Thyroid-stimulating hormone receptor